A wheel rotating wilth unifrom angular acceleration covers 50 revolutions in the first five seconds after the start. Find the angular acceleration and the angular velocity at the end of five seconds.

Answer

B, D

Explanation

`theta=100 pi,T=5sec `
`theta=1/2alphat^2`
`rarr 100 pi=1/2alopha 25`
`rarr alpha=8pi rad/s^2`
`=omega=omega_0+2t`
`=0+8pixx5=40pirad/s `
`=520 rev/s`