Question

A torque of 50 Nm acting on a wheel at rest rotates it with 200 rad sec-1 for 5.0 seconds. Calculate the angular acceleration produced:


A :
80 rad sec-2
Formula for this question?
B :
50 rad sec-2

C :
40 rad sec-2

D :
120 rad sec-2

Formula for this question?

Answer 1

Answer:

here torque = 50Nm

ω initial = 0

∅ = 200rad.

t= 10sec

by law of rotation

∅= ωinitial t + 1/2 α t^2

200 = 1/2 α× 10×10

α= 4 rad/sec^2