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

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

Text Solution

Verified by Experts

When string is not cut:
FBD of A block
`kx=mg+T`
FBD of B block
`T=mg`
when string is cut:
FBD of A block
`kx-mg=ma_(A)`
`2mg-mg=ma_(A)`
`=a_(A)=g` (upwards)
FBD of B block
`ma_(B)=mg`
`a_(B)=g` (downwards). ltBRgt
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