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Two blocks of masses 10 kg and 20 kg are...


Two blocks of masses 10 kg and 20 kg are connected by a light spring as shown. A force of 200 N acts on the 20 mass as shown. At a certain instant the acceleration of 10 kg mass is 12 `ms^(-2)` towards right direction.

A

At that instant the `20kg` mass has an acceleration of `12ms^(-2)`

B

At that instant the `20kg` mass has an acceleration of `4 ms^(-2)`

C

The stretching force in the spring is `120N`

D

none of these

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