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Initially the system shown in figure is ...

Initially the system shown in figure is in equilibrium. At the moment, the string is cut the downward of `a_(1)` and `a_(2)` are.
.

A

(a) zero and zero

B

(b) 2g and zero

C

(c) g and zero

D

(d) None of the above

Text Solution

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The correct Answer is:
B
`T =2mg`
As soon as string is cut T (on A) suddenly becomes zero . Therefore a force of 2mg on upward direction on A suddenly becomes zero.
So net force on it will become 2mg downwards.
`:. a^(1) = (2mg)/(m) =2g` (downwards)
Spring force dorce not become instantly zero so acceleration of B will not change abruptly.
or `a_(2) =0`
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