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Question

# The two blocks A and B of equal mass are initially in contact when released from rest on the inclined plane. The coefficients of friction between the inclined plane A and B are μ1 and μ2 respectively. (Given θ is greater than any of the angle of repose of the blocks.)

A
If μ1>μ2, the blocks will always remains in contact.
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B
If μ1<μ2, the blocks will slide down with different accelerations.
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C
If μ1>μ2, the blocks will have a common acceleration 12(μ1+μ2)gsinθ.
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D
If μ1<μ2, the blocks will have a common acceleration =μ1μ2gμ1+μ2sinθ.
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Solution

## The correct options are A If μ1>μ2, the blocks will always remains in contact. B If μ1<μ2, the blocks will slide down with different accelerations.The block with lower value of μ tend to have greater acceleration down the slope. Hence, if μ1>μ2 the blocks will always remains in contact and if μ1<μ2 the blocks will slide down with different accelerations.

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