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If there is a change of angular momentum from J to 4J in 4s, then the torque is ___________

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If there is a change of angular momentum from J to 4J in 4s, then the torque is ___________

(a) (3/4) J

(b) 1J

(c) (5/4) J

(d) (4/3) J

I have been asked this question in an online quiz.

Origin of the question is Significance of Moment of Inertia topic in division Laws of Motion of Engineering Physics I

1 Answer

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Best answer
Right choice is (a) (3/4) J

The best explanation: τ=dL/dt

τ=(4J-J)/4=3/4 J.

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