A wheel is making revolutions about its ais with unifrom angular acceleration. Starting from rest, ilt reaches 100 rev/sec in 4 seconds. Find the angular acceleration. Find the angle rotated during these four seconds.

Answer

A, B, D

Explanation

Given that `omega_0=0`
`omega=100 rev/s`
`omega=omega_0+alphat`
`: alpha=omega/t`
`alpha=100/4rev/s^2=25 rev/s^2`
`thet=theta_0t+1/2alphat^2`
`=1/2x25xx16`
`=200 degre
`200xx2pi radians
`=400 pi radians`.