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MCQ.A horizontal force of 25 N is necessary to just hold a block stationary against a wall.
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MCQ.A horizontal force of 25 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.4. The weight of the block is
(a) 15 N (b) 10 N. ( C) 20 N (d) none
(a) 15 N (b) 10 N. ( C) 20 N (d) none
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