Two masses of 10 kg and 20 kg respectively are connected by a massless spring as shown in figure. A force of 200 N acts on the 20 kg mass at the instant when the 10 kg mass has an acceleration of 12 ms-2 towards right, find the acceleration of the 20kg mass in ms-2.

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answer is 4.

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Detailed Solution

Force on 10kg block Kx=ma=12×10=120NSoa=8020=4m/s2

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