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Question
The angular momentum of the wheel changes from 3 L to 7 L in 4 sec. What is the magnitude of torque acting on it?
Options
L
2 L
3 L
4 L
MCQ
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Solution
L
Explanation:
As we know that τ = `"dL"/"dt"`
= `(7 "L" - 3 "L")/4`
= `(4 "L")/4`
= L
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Torque, Kinetic Energy, Angular Momentum and Its Conservation
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