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Three blocks A, B, and C of masses 3M, 2...

Three blocks A, B, and C of masses `3M, 2M`, and M are suspended vertically with the help of spring PQ and TU, and a string RS as shown in fig. If the acceleration of blocks A, B and C is `a_(1), a_(2)` and `a_(3)` , respectively, then

The value of acceleration `a_(3)` at the moment spring PQ is cut is

A

g, downward

B

g, upward

C

More than g, downwards

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
D
Force in spring can't change abruptly whereas tension in string can change.
When PQ is cut, no effect on the force acting on C, hence its acceleration remains zero.
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CENGAGE PHYSICS-NEWTON'S LAWS OF MOTION 1-Linked Comperhension
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