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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 = 0-41 =- 4 rad/s2τ = Iα = 2×103 ×(-4) = -8 ×103N-sign indicates retarding torque

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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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Ready to Test Your Skills?

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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.