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Question 30369
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Rigid Body Dynamics: JEE — Angular Momentum Change MCQ

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JEE — Angular Momentum ChangeHardQuestion 30369

Question

A wheel's angular momentum changes from 4 kg·m²/s to 10 kg·m²/s in 2 s. The net torque applied was:
  1. A
    7 N·m
  2. B
    3 N·m
    Correct
  3. C
    5 N·m
  4. D
    2 N·m

Correct answer

3 N·m

Explanation

τ = ΔL/Δt = (10−4)/2 = 3 N·m.

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