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A wheel initially at rest acquires an an...

A wheel initially at rest acquires an angular velocity of 128 rad `s^(-1)` in 4 s. Hence its constant angular acceleration is ………..

A

32 rad `s^(-2)`

B

128 rad `s^(-2)`

C

16 rad `s^(-2)`

D

64 rad `s^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
A
`alpha=(omega-omega_(0))/(t)`
`therefore alpha=(128-0)/(4)`
`therefore alpha=32" rads s"^(-2)`
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