Let the tension in the string connect. A and B be 'T' and let friction the force acting on A be fA
Now, for B,
T- fB -T' = [tex]M_{B} a[/tex]
but a = 0, since speed is constant.
∴ T- fB - T' = 0
FB = friction force on B = f = 10N.
∴ T - FB - T' = 0
given,
50N - 10N -T' = 0
or, T' = 40N
for 'A', acceleration a = 0
T' - FA = [tex]M_{A} A[/tex] = 0
or, FA = T' = 40N
∴ friction force acting on A is 40N.
Velocity is constant if both magnitude and direction do not change over time. In other words, this is when the rate of change of an object's position remains the same over a period of time. An object must have a constant speed in a constant direction. A constant direction forces an object to move in a straight line, so constant velocity means moving at a constant speed in a straight line.
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in a circle of radius 4 meters, what is the lenth of the arc that subtends a central angle of 100 degrees
The length of the arc that subtends a central angle of 100 degrees in a circle with a radius of 4 meters An arc measures 5.23 cm in length.
What is the length of an arc ?The formula for calculating a circle's arc length is:
[tex]l=\frac{\theta}{360^{\circ}}(2 \pi r)[/tex]
Where:
[tex]$\theta$[/tex] is the angle at its center that is subtended.
[tex]$2 \pi r$[/tex] is the circle's circumference.
its circumference [tex]$2 \pi r=(2) \cdot(3.14) \cdot(10)=62.8 \mathrm{~cm}$[/tex]
hence, arc length
[tex]\begin{aligned}& l=\frac{\theta}{360^{\circ}} \cdot(2 \pi r) \\& l=\frac{30}{360^{\circ}} \cdot(62.8) \\& l=\frac{62.8}{12} \\& l \approx 5.23 \mathrm{~cm}\end{aligned}[/tex]
The arc length is calculated by multiplying the radius by the central angle. If = 2 pi over 3 and the radius is 4 cm, the arc length is 8/3 cm. The following formula can be used to determine the length of an arc given an angle and a circle's diameter: ArcLength is equal to (angle / 360) (angle pi radius). Pi equals 22/7, diameter is 2*radius, and angle is in degrees.
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Fig. 62.7 A C₁2V 50 V 5₁ 30 (a) Calculate the readings of the ammeter and the voltmeter when the switches are as shown with S closed and S₂ open. Explain your calculations.
Generally, To solve this problem, we need to first analyze the circuit and determine the current and voltage at various points.
Starting at the left side of the circuit, we have a 50 V battery with its positive terminal connected to a resistor and its negative terminal connected to a switch. When the switch is closed, this allows current to flow from the battery through the resistor. The current will be given by Ohm's law:
I = V/R
Where I is the current, V is the voltage (50 V in this case), and R is the resistance of the resistor (5Ω in this case). Plugging in these values, we get:
I = 50 V / 5Ω = 10 A
Next, we need to determine the voltage across the resistor. This can be found using Ohm's law again:
V = IR
Where V is the voltage across the resistor, I is the current through the resistor (10 A in this case), and R is the resistance of the resistor (5Ω in this case). Plugging in these values, we get:
V = 10 A * 5Ω = 50 V
Since the voltage across the resistor is equal to the voltage of the battery, we know that the current through the resistor must be flowing in the same direction as the battery's current.
The ammeter in the circuit is connected in series with the resistor, so it will measure the current flowing through the resistor. Therefore, the reading on the ammeter will be 10 A.
The voltmeter is connected in parallel with the resistor, so it will measure the voltage across the resistor. Therefore, the reading on the voltmeter will be 50 V.
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during this phase, although temporary, the membrane potential becomes more negative than the resting level.
Different concentrations both inside and outside the cell contribute to the resting membrane potential. The cell membrane's greater permeability to potassium ion movement than to sodium ion transport is what gives the cell its negative charge.
K+ (a cation) efflux through K+ channels or Cl- (an anion) influx through Cl- channels are frequent causes of hyperpolarization. The neuron enters a 2-millisecond refractory phase while hyperpolarized, during which time it is unable to produce further action potentials.
A neuron that is at rest preserves its electrical polarisation, or the fact that its membrane has a negative electrical potential relative to the outside. The resting potential is the name given to this difference in electrical potential or voltage. This potential is roughly -70mV while at rest.
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David is fighting Goliath. If David’s 0.75-m sling is accelerated for 1.5 s at
20 rad/s2, what will be the initial velocity of the projected stone?
The initial velocity of the projected stone is 22.5 m/s.
How is angular velocity defined?angular velocity is the speed at which the angle between two bodies changes when an object rotates or revolves around an axis. This displacement is depicted in the image by the angle formed by a line on one body and a line on the other.The angular acceleration, which is typically denoted by and written in radians per second per second, is the time rate of change of the angular velocity.given :
radius r= 0.75 m
[tex]\Delta t =1.5\ s[/tex].
angular acceleration [tex]\alpha[/tex] = 20 rad/s2
angular acceleration [tex]\alpha[/tex] = [tex]\frac{\Delta \omega}{\Delta t}[/tex]
angular velocity = [tex]\alpha \times \Delta t[/tex]
= 20 * 1.5 =30 rad s⁻¹.
angular velocity to liner velocity
V = r [tex]\omega[/tex]
= 0.75 * 30 = 22.5 m/s
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Due to an unequal distribution of fuel in the wing tanks, the centers of gravity for the airplane fuselage A and wings B and C are located as shown. Draw a free-body diagram of the airplane. If these components have weights W_A = 43000lb , W_B = 8000 lb, and W_C = 6000 lb determine the normal reactions of the wheels D, E, and F on the ground.
The normal reactions of the wheel is determined as 13222.22 lb at point F and 21888.89 lb for point E and D.
Free body diagram of the plane is drawn by removing all the supports and replacing with forces. Equilibrium of moment of forces about x-axis is considered and relation between the reaction forces at point D and E is determined. Equilibrium of moment of forces about y-axis is considered and value of the reaction force at point F is determined. Moment of axis (line) is considered to eliminate an unknown force and get equation with other two variables.
After drawing the free body diagram, apply force balance about x-axis:
= ∑Mₓ = 0
= - (R₄ X 14) + (R₅ X14) + (W₂ X 6) - (W₃ X 8) = 0
= (R₅ - R₄) X 14 = (W₃ X 8) - (W₂ X 6)
= R₅ = R₄
Apply moment balance about y axis,
= ∑Mₙ = 0
= - (R₆ X 27 ) + (W₁ X 7) + (W₂ X 4) + (W₃ X 4) = 0
= R₆ = 13222.22 lb
Next, consider force equilibrium equation.
Write the force equilibrium equation along vertical axis, z-axis;
= ∑F = 0
= R₆ + R₅ + R₄ - (W₁ + W₂ + W₃) = 0
where, R represents reaction and W represents load.
= R₆ + R₅ + R₄ - (W₁ + W₂ + W₃) = 0
= R₅ = R₄ = 21888.89 lb
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A large cannon is mounted on a cart with frictionless wheels that is initially at rest on a horizontal surface. The cannon fires a large cannonball to the right with a speed v_b which is then caught by a trap firmly attached to the cart. What is the final speed of the cannoncart-cannonball system? V > v_b, to the left
The final velocity of the cannonball-cart system is less than the initial velocity of the cannonball and the system will move in the direction of the cannonball ( V < v_b ).
What is the law of conservation of linear momentum?
The law of conservation of linear momentum states that the sum of the initial momentum is equal to sum of the final momentum, provided that the system is Isolated.
Mathematically, the law of conservation of linear momentum is given as;
Pi = Pf
where;
Pi is the sum of the initial momentumPf is the sum of the final momentumm₁u₁ + m₂u₂ = v ( m₁ + m₂ )
where;
m₁ is the mass cannon ballu₁ is the initial velocity of the cannon ballm₂ is the mass of the cartu₂ is the initial velocity of the cartv is the final velocity of the cannoncart-systemsince the cart is initially at rest, the initial velocity of the cart = 0
m₁u₁ + 0 = v ( m₁ + m₂ )
m₁u₁ = v ( m₁ + m₂ )
v = ( m₁u₁ ) / ( m₁ + m₂ )
given initial velocity of the cannon ball = v_b
The final velocity of the cannonball-cart system is calculated as follows;
V = ( m₁v_b ) / ( m₁ + m₂ )
Hence, V < v_b
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(a) A Carnot engine working in a forward direction (i.e. taking heat from a hot body and rejecting remaining heat after work to a cold body) is a heat engine. Therefore the engine to be used as a heat engine operates in a direction. as it is in contact with the heat reservoir during this segment; and, as its is in contact with cold sink.
A heat engine, symbolized by a circle in this illustration, uses some of the heat transfer to produce work.
The most effective heat engine that is theoretically possible—i.e., any machine that can transform thermal energy (heating) into mechanical energy—is the Carnot engine (work).The heat and cold reservoirs are the names given to the hot and cold items. Only the hot temperatures' absolute values affect efficiency. A portion of the heat QH that is extracted from the high-temperature source TH in the case of a heat engine is transformed into work. The ratio of net work completed to heat absorbed throughout one full cycle is known as a heat engine's thermal efficiency.
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write a story and create a star schema in erwin: you need to add attributes to each entity (table) your model should include at least one fact and four dimensions you must submit your solution using erwin (as a .erwin file) and a pdf file. the erwin includes star schema and pdf file includes the story.
A dimensional model constructed as a star arrangement is known as a star schema.
Star Schema Design
A huge central table, known as the fact table, is often surrounded by smaller satellite tables, known as dimension tables, that are connected to the fact table in a radial design. An outrigger table and a dimension table can optionally be connected in a star structure.
Dimensional modelling elements are demonstrated in the following data warehouse example from a movie rental shop. Customer, Movie, Market, and Time are dimension tables; District and Region are outrigger tables; and the REVENUE table is a fact table. The REVENUE fact table includes revenue information for each customer's rentals of movies over time in a certain geographic area. The customers, films, marketplaces, and time periods utilized in the fact table are defined in the database's dimension tables.
To visually demonstrate that a table is a fact, dimension, or outrigger table, you can display icons. Right-click a white space in the diagram window of a dimensional model, then select Table Display, Dimensional Icon.
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If you push on a heavy box which is at rest you must apply some force to start its motion however once the box is sliding you can apply a smaller force to maintain its motion
The reason why the stationary object is more difficult to move is the law of inertia.
What is the Newton first law?We know that according to the Newton first law, an object that is at rest would continue to be at rest unless the object has been acted upon by an external force. Also, the object that is in a state of constant motion would continue in the state of constant motion unless the object has been acted upon by an external force.
The law that I have just described above is called the law of inertia. The concept of the law has to do with a reluctance towards motion. The object does not move easily. We would have to apply a lot of force to the object which would enable us to over come this force of inertia and get the object to start moving in the first place. A little force can now maintain the motion of the object in a straight path.
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4. For an ideal gas, the specific heat at constant pressure Cp is greater than the specific heat at constant volume CV because the A. pressure of the gas remains constant when its temperature remains constant B. gas does work on its environment when its pressure remains constant while its temperature is in creased C. increase in the gas's internal energy is greater when the pressure remains constant than when t he volume remains constant D. heat input per degree increase in temperature is the same in processes for which either the pressure or the volume is kept constant
Whenever the gases are heated at a fixed volume, no outside work is done as well as the heat energy given is simply used to make the gas more energetic internally.
Why is CP for just an ideal gas higher than Cv?The specific heat under constant pressure for an ideal gas, Cp, is higher than Cv.This is due to the fact that when the gas' temperature rises while the pressure stays constant, the gas must perform some finite work on its surroundings.
Does CP always exceed Cpk?When the goal value and the specification's average are equal, Cpk equals Cp.Never can Cpk go above Cp.With the creation of descriptive statistic displays and histograms, Cp and Cpk can both be determined.
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Interpret Would a hurricane be more likely
to remain a hurricane if it reached point A or
point B? Explain your answer.
Interpret If a hurricane got to point B, would it be more likely to stay a hurricane. because warm ocean water is what creates hurricanes. The hurricane will likely continue to be a hurricane if it travels to point b because it will still be on the ocean.
What does a hurricane means?A tropical storm is considered a hurricane if its sustained winds are 74 mph or higher. The eye of a storm can extend 400 miles and is normally 20 to 30 miles wide. Storms can be hazardous due to their intense rainfall, powerful gusts, and storm surges. A spiral arrangement of thunderstorms that produce torrential rain and squalls, a low-pressure center, and powerful winds are the characteristics of a tropical cyclone, a fast revolving storm system.
What kills a hurricane and why do hurricanes happen?In a 2014 study, Dr. Edward Rappaport, the National Hurricane Center's deputy director, found that water is the No. 1 killer during a hurricane or tropical storm that strikes the U.S., accounting for nearly 90% of all tropical cyclone deaths. Most people drown in storm surge, rainfall flooding, or high surf.
Warm ocean water and humid, moist air are required for one to form. Water is released from the air, forming the storm clouds, while humid air is flowing upward at a zone of low pressure over warm ocean water. The air within a storm rotates as it climbs.
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FILL IN THE BLANK. for a t statistic, the magnitude of the estimated standard error is___. the sample variance correlates in a positive direction directly related to sample variance and inversely related to sample size has no effect on the variance or sample size increases cohen's d
For a t statistic, the magnitude of the estimated standard error is inversely related to sample size.
The sample variance does not have an effect on the magnitude of the estimated standard error for a t statistic. However, the sample variance is directly related to the variance of the population from which the sample is drawn. The sample size, on the other hand, is inversely related to the magnitude of the estimated standard error for a t statistic.
Cohen's d is a measure of effect size that is used to compare the means of two groups. It is not related to the magnitude of the estimated standard error for a t statistic.
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Sorrow, hurt, anger, guilt, confusion, and other feelings that arise after suffering a loss are reflected in: a. grief. b. acceptance. c. mourning. d. distancing.
Correct answer:- (a) grief
Sorrow, hurt, anger, guilt, confusion, and other feelings that arise after suffering a loss are reflected in grief.
What does grief mean?Regardless of whether someone's sadness is caused by the loss of a loved one or by receiving a terminal illness, grief is a powerful, perhaps overwhelming feeling for people.
What is the duration of grief?
Grieving typically lasts for a year or longer. The individual in grieving must deal with the emotional and life changes brought on by the loss of a loved one. It's normal to feel emotionally attached to the deceased for a very long time after they have passed away, even though the anguish may eventually lessen.
How much time does grief last?Grieving typically lasts for a year or longer. The individual in grieving must deal with the emotional and life changes brought on by the loss of a loved one. It's normal to feel emotionally attached to the deceased for a very long time after they have passed away, even though the anguish may eventually lessen.
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A sinusoidal transverse wave has a wavelength of 2.80 m. It takes 0.10 s for a portion of the string at a position x to move from a maximum position of y = 0.03 m to the equilibrium position y = 0. What are the period, frequency, and wave speed of the wave?
The sinusoidal transverse wave has a period of 0.40 seconds, a frequency of 2.5 Hz, and a wave speed of 7.0 meters per second.
Exactly how sinusoidal are transverse waves?Whereas both wave types are sinusoidal, longitudinal waves oscillate parallel to the path of propagation while transverse waves oscillate perpendicular to the direction of propagation. Light and sound waves are the two types of transverse waves that are most frequently encountered.
What does a sine wave motion look like?The most natural way to depict how many things in nature change state is with a sine wave or sinusoidal wave. The amplitude of a variable can be visualized changing over time using a sine wave. Sound that can be heard might be the variable.
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hich of these is not evidence we must consider for the nebular theory? question 10 options: the number of moons per planet. all planets orbit counter-clockwise the two major groupings of planets (terrestrial/jovian). all planets lie close to the ecliptic plane.
We don't need to know about the number of moons per planet in order to support the nebular theory. Hence, option 1 is the correct answer.
The Nebular theory is the most successful theory in the field of cosmology which explains the formation and evolution of the solar system. It was proposed by Immanuel Kant in 1755.
It consists of the following steps-
1) collapse of gases named Nebula Stage
2) Spinning Planetary disc stage, which refers to the rotation of the matter.
3) Protosun Stage, which refers to the formation of the pre-sun.
4)Proto-planets formation stage, which occurs when the inner planet became to form.
5)Moons forming or larger planets forming stage.
6)Final stage, is when the entire solar system is formed.
The Correct answer according to the above postulates is 1) the Number of Moons per planet.
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an astronaut drops a rock from the top of a crater on the moon when the rock is halfwat down to the bottom of the crater its speed is what fraction of its cinal impact speed?A. 1/4–√2B.1/4C. 1/2–√2D. 1/–√2Answer:
The fraction of its final impact speed is 1/√2.
Impact speed is the speed of the vehicle at the time of impact or collision.
The rock has lost half of its gravitational potential energy, its kinetic energy at the halfway point is half of its kinetic energy at impact.
As we know kinetic energy is directly proportional to mass (m) and velocity square (v²),
KE ∝ v²
KE = (1/2)mv²
then K.E at halfway point is equal to 1/2 x K.E,
Then,
The K.E at impact, then the rock’s speed at the halfway point its speed at impact will be 1/√2 its impact speed.
Therefore option D is the correct answer, the fraction of its final impact speed is 1/√2.
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1.The pressure of a gas remains constant while the temperature, volume, and internal energy of the gas increase by 52.7 Co, 1.48 x 10-3 m3, and 946 J, respectively. The mass of the gas is 29.9 g, and its specific heat capacity (at constant pressure) is 1060 J/(kg Co). Determine the pressure. 2. Under constant-volume conditions, 3600 J of heat is added to 1.9 moles of an ideal gas. As a result, the temperature of the gas increases by 65.1 K. How much heat would be required to cause the same temperature change under constant-pressure conditions? Do not assume anything about whether the gas is monatomic, diatomic, etc.
While a gas's temperature, volume, and internal energy rise, its pressure stays constant. An ideal gas sample is heated while maintaining a fixed pressure.
The temperature of a cylinder containing an ideal gas with fixed mass and constant volume is changed. At constant pressure of 2.0 atm, the volume of an ideal gas is dropped from 5.0 L to 5.0 mL. Calculate the work required for this process in J. Assuming the environment is always at a constant 300:0 K temperature and pressure, Without adding or removing heat, the volume of a perfect monoatomic gas is squeezed to halve.
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g calculate the mass-to-light ratio for a globular cluster with a luminosity of 106 lsun and 105 stars. (assume that the average mass of a star in such a cluster is 1 msun.)
The mass-to-light ratio for a globular cluster is equal to 137.7 kg/lsun
To measure the mass-to-light ratio of a globular cluster, we first determine the total mass of the cluster. Since the cluster has 105 stars, and the average mass of a star in the cluster is 1 m-sun, therefore, the total mass of the cluster is 10^5 * 1 msun = 10^5 msun.
Now, we convert the luminosity of the cluster from solar units to kilograms. The luminosity of the cluster is given as 10^6 lsun, which is equal to 10^6 * 3.828 x 10^26 W.
Using the equation, [tex]E = mc^2[/tex], we can convert this energy to mass:
[tex]mass = (luminosity * time) / (c^2)[/tex]
where, c is the speed of light (3 x 10^8 m/s) and time is the amount of time over which the luminosity is measured (here, time is equal to 1 second).
Substituting the values in above equation, we find that the mass of the cluster in kilograms is approximately 1.45 x 10^31 kg.
To determine the mass-to-light ratio, divide the total mass of the cluster (in kilograms) by its luminosity (in solar units):
mass-to-light ratio = (total mass of cluster in kg) / (luminosity in solar units)
Substituting the values in above equation, we find that the mass-to-light ratio for this globular cluster is approximately:
1.45 x 10^31 kg / 10^6 lsun = 137.7 kg/lsun.
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estimate the radiation pressure due to a 100- w bulb at a distance of 5.0 cm from the center of the bulb. assume that light is complitely absorbed.
The radiation pressure due to 100w bulb at a distance of 5.0cm from the center of the bulb is [tex]1.06*10^{-5} N/m^{2}[/tex]
Radiation pressure is the mechanical pressure exerted on any surface due to momentum exchange between an object and an electromagnetic field. It includes pulses of light or electromagnetic radiation of any wavelength that are absorbed, reflected, or emitted by matter of any size.
Calculation :
power out put of the bulb p' = 100 W
distance of the finger from the bulb [tex]r = 5.0*10^{-2}[/tex]
the radiation pressure is P = I/c ............. (1)
but intensity I = p'/A
so , eq (1) becomes
P = p'/Ac .................. (2)
here, speed of light [tex]c = 3*10^{8}[/tex]
area [tex]A = 4\pi r^{2}[/tex]
[tex]= (4)*(3.14)*(5.0*10^{-2}m )^{2}[/tex]
[tex]= 314*10^{-4}[/tex][tex]m^{2}[/tex]
substitute the given data in eq (2) , we get
radiation pressure P = p'/Ac
[tex]= (100 W)/(314*10^{-4}m^{2} )(3*10^{8}m/s )[/tex]
[tex]= 1.06*10^{-5} N/m^{2}[/tex]
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when a man loves a magnetic continually changes magnitude and direction a voltage is continually being induced in the coil this voltage is called voltage
When a magnetic field continually changes magnitude and direction, a voltage is continually induced in the coil. This voltage is called induced voltage.
Induced voltage is the type of voltage that is a product of electromagnetic induction. It is generally defined as the rate of change of magnetic flux with respect to time via a closed circuit.
A wire that is carrying a current will experience an induced voltage along its length if the current changes. The changes in current change the magnetic field flux perpendicular to the wire.
Induced voltage is calculated using the Faradays equation:
e = N(dΦ/dt)
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Emily and Henry were in the lab and graphed the heating of ice to 125°C. Emily and Brad made an observation that the graph contains three sloped and two level portions. Emily and Brad determined that the two level portions in the graph represented:
The two level portions in the graph represented phase changes.
What are phase changes?
The transition of matter from one state (solid, liquid, gas, or plasma) to another is referred to as a phase change. These changes also take place when the pressure on the system varies, as well as when the system receives enough energy or loses enough energy.
The slope of the line dividing two phases is determined by the relative densities of the two phases. The solid-liquid line, for instance, slopes up and to the right if the liquid is less dense than the solid, whereas up and to the left if the liquid is denser than the solid.
Therefore the two level portions in the graph represented phase changes.
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A large water tank with cross sectional area A and height of h is filled to the top with water (density= rho). There is a hole of cross sectional area a located at the bottom of the tank. The velocity of the water exiting the small hole is
A large water tank with cross sectional area A and height of h is filled to the top with water (density= rho). There is a hole of cross sectional area a located at the bottom of the tank. The velocity of the water exiting the small hole will raise to a height and then stop.
what is density?The mass of a substance per unit volume is used to define its density.Mass/Volume is the formula for density.Unit of Density = Unit of Mass/Unit of VolumeSI unit of density equals kg/m3 CGS unit of density equals g/ml (1 cm3 = ml).However, we typically employ g/cm3.A substance's distinctive quality is its density.How tightly a substance's molecules are packed into a specific volume is determined by its density.The amount of mass in a given space is measured as density. It is a means to gauge how small an object is.It is the quantity of molecules present in a space or the mass of matter per unit volume.To learn more about density refer to:
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Which is the correct equation for calculating the kinetic energy of an object?
Answer:
Below
Explanation:
K.E. = 1/2 * m * v^2
All the following statements are true. Which one makes it possible to learn of the existence of extrasolar planets without seeing the planets themselves?Planets exert gravitational tugs on their stars that cause stars to orbit around the center of mass of their planetary systems.
Planets exert gravitational tugs on their stars that cause stars to orbit around the center of mass of their planetary systems. is true
What does the term "extrasolar planet" mean?Extrasolar planets, often known as exoplanets, are any planetary bodies outside of the solar system that typically circle stars other than the Sun.A planet beyond the Solar System is referred to as an exoplanet or extrasolar planet. In 1917, the first potential sign of an exoplanet was observed, but it was not taken seriously. In 1992, the first detection confirmation took place. 1988 saw the discovery of a different planet, which was verified in 2003. Telescopes have photographed a small number of exoplanets directly, but the great majority have been discovered via indirect techniques like the transit method and the radial-velocity approach. There are 5,284 confirmed exoplanets in 3,899 planetary systems as of December 1, 2022.The complete questio is Which one makes it possible to learn of the existence of extrasolar planets without seeing the planets themselves?
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if you weight 100 pounds on earth,
what would you weight on the moon
Answer: 16 Pounds.
To figure out how much YOU would weigh on the moon, take your weight and divide it by 6. So, if you weighed 100 pounds on Earth, you would weigh only about 16 pounds on the moon.
A 17,973 g object has an acceleration of 2m/s². What is the net force applied to the
object
Answer:
According to Newton's second law of motion, the acceleration of an object equals the net force acting on it divided by its mass, or a = F m .
Explanation:
A polo player’s arm and stick form a 2.5-m rigid segment. If the arm and
stick are swung with an angular speed of 1.0 rad/s as the player’s horse gallops
at 5 m/s, what is the resultant velocity of a motionless ball that is struck
head-on? (Assume that ball velocity is the same as the linear velocity of the
end of the stick.)
A polo player's arm and stick together measure 2.5 metres in stiffness. A head-on collision with a still ball results in a velocity of r=7.27 m/s.
What does velocity mean to you?
The velocity of any object is the speed at which it is moving in that direction as quickly as a car travelling north on such a route or a rocket taking flight.
What does velocity provide as a means of?
Motion that starts in one place and moves to another is measured in terms of velocity. There are innumerable practical applications for velocity, but one of the more common ones is determining how quickly you will travel between two locations.
Briefing:
sv=rω
where ω = angular speed
r = the circle's radius.
v=1×2.5=2.5" " m/s
v=(2.5+5)m/s=7.5" " m/s
r=√(〖2.5)²+5²+2(2.5×5)cosθ)]
r=√(〖2.5)²+5²+2(2.5×5)cos30^0 )]
r=7.27m/s
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A mass m is suspended by a massless string forming a simple pendulum of length 2.0 m. The string of the pendulum is initially at an angle of 60° with the vertically downward direction when the mass is released from rest.
The centripetal acceleration of the mass m when it is at the lowest position is 10 m/s². The correct option is A.
What is centripetal acceleration?Centripetal acceleration is a characteristic of an object's motion along a circular path. Centripetal acceleration applies to any object moving in a circle with an acceleration vector pointing in the direction of the circle's center.
A projectile is an object that is launched into the air and then moves only in response to the acceleration of gravity. The trajectory of the object is referred to as the projectile's trajectory.
The equation of projectile motion is:
[tex]V = \sqrt{2gh}\\\\\\V = \sqrt{2 \times 10 \times \dfrac{1}{2} } \\\\V = \sqrt{20}[/tex]
a² = v² / l = 20 / 2 = 10 m/s²
Therefore, the correct option is A, 10 m/s².
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The question is incomplete. Your most probably complete question is given below:
The centripetal acceleration of the mass m when it is at the lowest position is:
10 m/s²
5 m/s²
20 m/s²
25 m/s²
Earth satellite whose height is 35786 km then find its distance velocity ?
help me it's urgent i mark u brainlist
Earth satellite whose height is 35786 km them the distance velocity is 11,300 km/h.
What is satellite?Satellite is defined as a piece of technology that is launched into space and orbits the earth or another planet with a specific purpose. An object that orbits a larger object can be referred to as a satellite.
The equation for estimating the speed for the orbital velocity of a satellite is derived using the centripetal force and gravitation equations. The spacecraft would need to maintain a velocity of roughly 11,300 km/h in order to complete one orbit of the earth, which is located nearly 35,786 km above the surface of the planet.
Thus, earth satellite whose height is 35786 km them the distance velocity is 11,300 km/h.
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What quantity describes how long an object is moving for?
