Q.

A constant torque acting on a uniform circular wheel changes its angular momentum from A0 to 4A0 in 4 s. The magnitude of this torque is equal to

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a

3A04

b

4A0

c

A0

d

12A0

answer is A.

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Detailed Solution

τ = ∆L∆t = 4A0-A04 = 3A04
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