Two masses of 1 kg and 2 kg respectively are connected by a massless spring as shown in figure. A force of 20 N acts on the 2 kg mass at the instant when the 1 kg mass has an acceleration of 10ms -2 towards right, the acceleration of the 2 kg mass is:

Text Solution
Verified by ExpertsThe correct answer is:
B

F = m 1 a 1 + m 2 a 2 [Newton’s law for system]
20 = 1 × 10 + 2 × a
a = 5 m/s 2 .
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