5. Friction is independent of weight , but depends on normal force between surfaces of contact discuss? 6. What ways do you know to reduce friction? 7. Explain why sportsmen use shoe with spikes?
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YES,IAGREE. WHEN A BLOCK IS PRESSED AGAINST A ROUGH VERTICAL WALL, THE THE FRICTIONAL FORCE DEPEND ON THE NORMAL FORCE WHICH IS EQUAL THE PRESSED FORCE NOT ON THE WEIGHT OF THE BLOCK
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