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A block of mass 1 kg is placed at point A of a rough track ( see sketch below). If slightly pushed towards right, it

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A block of mass 1 kg is placed at point A of a rough track ( see sketch below). If slightly pushed towards right, it stops at point B of the track. Calculate the work done by the frictional force on the block during its transit from A to B. A B 1m 0.8m

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