Test Academy | The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half is rough. A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower half is given μ= sin θ, μ= cot θ, μ= 2 cos θ, μ= 2tan θ

Question

The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half is rough. A body starting from the rest at top comes back to rest at the bottom if the coefficient of friction for the lower half is given

Options :

μ= sin θ
μ= cot θ
μ= 2 cos θ
μ= 2tan θ

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