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Normal Force

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Question

A horizontal force of 5N act on a block of mass 10 kg kept on a rough horizontal surface. The coefficient of friction between the block and the rough surface is 0.3. Find the magnitude of frictional force acting between them, (g = 10 m/s²)

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Solution

frictional force = coefficient of friction × mass × acceleration(gravity) = 0.3 × 10 × 10 = 30N

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