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A constant torque acting on a uniform ci...

A constant torque acting on a uniform circular wheel changes its angluar momentum from `A_0` to `4 A_0` in `4 s`. The magnitude of this torque is equal to.

A

`3 A_0//4`

B

`4 A_0`

C

`A_0`

D

`12 A_0`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) `tau = (Delta L)/(Delta t) = (4 A_0 - A_0)/(4) = (3 A_0)/(4)`
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Knowledge Check

  • A constant torque acting on a uniform circular wheel changes its angular momentum from A to 4A in 4sec . The torque acted on it is

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    A
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