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A wheel of moment of inertia $2.0 \times 10^{3} {kgm}^{2} is rotating at uniform angular speed of 4 {rads}^{- 1} . What is the torque required to stop it in one second .$

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0.5 × 103 Nm

8.0×103 Nm

2.0 × 103 Nm

none of these

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detailed solution

Correct option is B

α = ωt = 41 = 4 rad/s2τ = Iα = 2×103×4 = 8×103 N

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A wheel of moment of inertia 2.0 × 103 kgm2 is rotating at uniform angular speed of 4 rads-1. What is the torque required to stop it in one second.

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A wheel of moment of inertia $2.0 \times 10^{3} {kgm}^{2} is rotating at uniform angular speed of 4 {rads}^{- 1} . What is the torque required to stop it in one second .$