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From Newton's second law for rotational motion, calculate τ.

1. τ = dL/dt
2. τ = r × F
3. τ = 2i − 6j − 12k
4. τ = 0

Correct answer: τ = dL/dt

Solution

Newton's second law for rotational motion states that the net torque (τ) acting on a body is equal to the rate of change of its angular momentum (L), i.e., τ = dL/dt.

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