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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. `A_(0)`
C. `4A_(0)`
D. `12A_(0)`

1 Answer

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Best answer
Angular impulse `=` change in angular momentum
`tau Delta t=Delta Limplies tauxx4=4A_(0)-A_(0)`
`tau=(3A_(0))/(4)`

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