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A constant torque acting on a uniform ci...

A constant torque acting on a uniform circular wheel changes its angular momentum from `A_(0)` to `2A_(0)` in `1s`. The magnitude of this torque is

A

`(3A_(0))/(4)`

B

`A_(0)`

C

`4A_(0)`

D

`12A_(0)`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau = (Delta L)/(Delta t)= (dL)/(dt)= (4 A_(0) - A_(0))/(4)= (3A_(0))/(4)`
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