A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5N on the block. If the coefficient of friction between the block and the wall is 0.5, the magnitude of frictional force acting on the block is:
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Force cancels the normal reaction since block is not moving.
Therefore,
F - N = 0
F = N = (mg)
F = C x N .....(C =coefficient of friction)
F = 0.5 x 5
F = 2.5N
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