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Two blocks of masses 2 kg and 4 kg are connected by a light string and kept on horizontal surface. A force of 16 N is acted on 4 kg block horizontally as shown in figure. The coefficient of friction between 4 kg and ground is 0.3 and between 2 kg block and ground is 0.6. Then, friction force on 2 kg block is_______newton (Use $g = 10 m s^{- 2}$ )

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answer is 4.

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Detailed Solution

If we balance forces on 4kg block the value of T comes out to be 4N

$F_{S} = 12 N$ in case of 4 kg block

Now on balancing the forces on 2 kg block, $F_{S} = T$
Therefore $F_{S} = 4 N .$

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