Answer:
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A physics student weighing 500 N stands on a scale in an
elevator and records the scale reading over time. The data is
shown in the graph above. At time t = 0, the elevator is at rest
on the ground floor. What is the acceleration of the student
from 10-15 s?
According to the question , net force is zero so the acceleration of student is zero.
By data, what do you imply?Data is data that has been transformed into a form that is useful for transfer or analysis in computers. Data is data that has been transformed into binary digital form for use with modern technology and communication mediums. The topic of data can be used in either as the single or the plural.
Briefing:Weight= 500mg
m = 500/9.8 = 51.02Kg
g=9.8ms^2
b) when scale elevator is at rest, acceleration is zero so net force is zero
N-mg = 0
N = mg = 500N
c) During 5-10 second , N = 500N , from graph
N-mg = ma
500-500 = 51.02a
a = 300/51.02
= 5.85m/s^2 upward
d) 10-15 second , reading is 500N
so, N-mg = 500-500
= 0N
Net force is zero acceleration is zero so moving with a constant velocity or at rest.
e) During 15-20 scale reading is 300
300-500 = m2a
-200 = 51.02a
a = -3.92m/s2 downward
Net force is zero , so it moves with constant velocity.
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