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Effect of Nature of Surface on Friction

A body of 10 ...

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A body of 10 kg is kept on a rough horizontal surface which can offer maximum frictional force or 40 N what will be the frictional force when applied force is 20 N?

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Q. A body of mass 2 kg is placed on a horizontal surface having kinetic friction 0.4 and static friction 0.5. If the horizontal force applied on the body is 2.5 N, the frictional force acting on the body will be ( g = 10

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