Angular displacement of a wheel is θ(t)=2t³-6t². At what time is net torque on it zero (constant I)?
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Angular displacement of a wheel is θ(t)=2t³−6t². At what time is net torque on it zero (constant I)?

G1 Physics · Accepted Answer

Step 1: ω=dθ/dt=6t²−12t; α=d²θ/dt²=12t−12. Step 2: Torque τ=Iα vanishes at t=1 s. Final answer: D — t=1 s.