JEE Advanced 2020 Concept Recapitulation Test 2 Paper 1

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Question : 5 of 54

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In the adjoining figure block A is of mass m and block B is of mass 2m. The spring has a force constant k. All the surfaces are smooth and the system is released from rest with spring unstretched

The maximum extension of the spring is ‌
4mg
k
The speed of block A when extension in spring is ‌
2mg
k
, is 2g√‌
2m
3k
Net acceleration of block B when the extension in the spring is maximum, is ‌
2
3
g.
Tension in the thread for extension of ‌
2mg
k
in spring is mg.

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