Questions
Two blocks A and B are pressed against a vertical wall by applying a horizontal force 'F' as shown in the figure. There is no friction between A and B. Then
a) Both the blocks A and B can be at rest for any magnitude of F
b) B can be at rest A moves down for smaller magnitude of F
c) Both A and B will move down for smaller magnitude
d) A can be at rest and B moves down for larger magnitude of F
detailed solution
Correct option is B
Frictional force between A and B is zero . Normal reaction N between the wall and A = F and fl = µs .FA will be at rest if ' f ' between A and the wall ≥ weight of A . So option - (2) is correct.Talk to our academic expert!
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A person just holds a block weighing 2kg between his hands & just keeps it from falling down by pressing it with his hands. If the force exerted by each hand horizontally is 50N, the coefficient of friction between the hand & the block is
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