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A wheel is rotating at 900 rpm about its...

A wheel is rotating at 900 rpm about its axis. When the power is cut off, it comes to rest in 1 min. The angular retardation (in rad `s^(-2)`) is

A

`pi//2`

B

`pi//4`

C

`pi//6`

D

`pi//8`

Text Solution

Verified by Experts

The correct Answer is:
A
`omega_(0) = 2pin = 30 pi, alpha = -30pi//60 = -pi//2`
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