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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

Verified by Experts

Discuss the problem before cutting the string:

From the force diagram of lower block,
`Kx_(0)=mg`
From the force diagram of upper block,
`T=2mg+kx_(0)`
Step II: Discuss the problem after cutting the string,
`2mg+kx_(0)=2ma`
or `2mg+mg=2ma`

or, 3mg=2ma
`:. a=3/2 g`.
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