In the shown system m 1 >M r . Thread QR is holding the system. If this thread is cut, then just after cutting.
A
Acceleration of mass m. is zero and that of m 2 is directed upward
B
Acceleration of mass m 2 is zero and that of m 2 is directed downward.
C
Acceleration of both the blocks will be same.
D
Acceleration of system is given by 
kg, where k is a spring factor.
kg, where k is a spring factor.
Text Solution
Verified by ExpertsThe correct answer is:
A
On cutting of string QR, the resultant force of m 1 remains zero because its weight m 1 g is balanced by the tension in the spring but on block m 2 a resultant upward force (m 1 – m 2 ) g is developed. This block m 1 will have no resultant whereas m 2 does have an upward acceleration given by 
.
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