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Two masses of 1kg and 2kg respectively are connected by a massless spring as shown in figure. A force of 20N acts on the 2kg mass. At the instant when the 1kg mass has an acceleration of 10ms−2 towards right, the acceleration of the 2kg mass is :
- 2ms−2
- 5ms−2
- 10ms−2
- 20ms−2
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