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Block A weight 20 kg placed on a smooth ...

Block A weight `20 kg` placed on a smooth surface. Weight B of `2 kg` is mounted on the block . The coefficient of friction between the block and the weight is `0.25` Calculate the acceleration of the block and the weightand also the frictional force between the block and the weight when a horizontal force `2 N` applied to the weight as shown in fig What will these quantities be if the horizontal force is `20 N? (g = 10ms^(-2))`

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