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PhysicsNLMFrictionMedium2 minQB
PhysicsMediumsingle choice

Consider the situation shown in the figure. The wall is smooth but the surfaces of blocks A and B in contact are rough. The friction on B due to A in equilibrium is:

Options:

Answer:
D
Solution:

Block A can be held up only by friction from B (the wall is smooth), so by the third law B feels a downward friction from A.

Then nothing supports B against its own weight plus this downward friction, so equilibrium is impossible.

Option D.

Stream:JEESubject:PhysicsTopic:NLMSubtopic:Friction
⏱ 2mℹ️ Source: QB

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