Find the angular velocity of a body rotating with an acceleration of `2 rev /s^2` as it completes the 5th revolution after the start

Answer

B

Explanation

`theta=5. alpha=2rev/s^2, omega_0=0, omega=?`
`omega^2=(2alphatheta)`
`rarr omega=sqrt((2xx2xx5))`
`=2sqrt5 rev/s`
`or theta=10pirad`
`alpha=4pirad/s`
`omega_0=0`
`omega=?`
`omega=sqrt(2alphatheta)`
`=(2xx4pixx10pi)`
`=4pisqrt5rad/s`
`=2sqrt5rev/s`