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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 `4 A_(0)` in `4` seconds. Find the magnitude of this torque.

A

`(3A_(0))/4`

B

`A_(0)`

C

`4A_(0)`

D

`12A_(0)`

Text Solution

Verified by Experts

The correct Answer is:
A
`tau = (DeltaL)/(Deltat) rArr tau =(4A_(0)-A_(0))/4 = (3A_(0))/4`
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