A horizontal force of 10 N 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
A
20 N
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B
50 N
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C
100 N
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D
2 N
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Solution
The correct option is D 2 N Horizontalforceonbody=NornalreactionforceN=10Nmaximumfrictionf=μN=Mgthus,Mg=0.2×10=2NHence,theoptionDisthecorrectanswer.