A horizontal force of 10N is necessary to just hold a block stationary against a wall .the coefficient of Friction between the block and the wall is 0.2 . the weight of the block is [AIEEE 2003]
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Explanation:- Let R be the normal contact force by wall on the block
- R= 10N
- F(limiting) = W and FL = μR
- μR = w or w = 0.2× 10 = 2N Answer
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