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A rectangular uniform parallelepiped slab is placed on a fixed inclined plane of inclination $θ$ with the horizontal as shown in the figure. L and R represent the left and right half of the slab. Four observations followed by corresponding conclusions are given below Choose the correct one:

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When the inclined plane is smooth force exerted by inclined plane on right half is greater than that on left half.

When inclined plane is sufficient rough to present slipping the force exerted by inclined plane on right half is more than the on left half.

When inclined plan is sufficiently rough to present slipping the force exerted by inclined plane on right half is less than that’s on the left half.

When inclined plane is sufficiently rough to present friction the fore exerted by inclined plane is same on both right and left half.

answer is B.

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Detailed Solution

Net torque on the system must be zero about CM.

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