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Two blocks A and B of same mass m attach...

Two blocks A and B of same mass m attached with a light spring are suspended by a string as shown in fig. Find the acceleration of block A and B just after the string is cut.

Text Solution

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When blocks A and B are I equilibrium position
When string is cut, tension T becomes zero. But spring does not change its shape just after cutting. So spring force acts on mass B, again draw FBD of blocks A and B as shown in fig.

,
`mg+T_(0)=ma_(A)`
`2mg=ma_(A)`
`a_(A)=2g` (downwards).
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