Questions
The system shown in the figure is released from rest. The spring gets elongated
(Neglect the friction and masses of pulley, string, and spring.)
detailed solution
Correct option is D
Let spring does not get elongated, then net pulling force on the system is Mg+mg−mg or simply Mg. Total mass being pulled is M+2m. Hence, acceleration of the system is a=MgM+2mNow since a < g, there should be an upward force on M so that its acceleration becomes less than g. It means there is some tension developed in the string. Hence, for any value of M spring will be elongated.Talk to our academic expert!
Similar Questions
Figure shows two blocks, each of mass m. The system is released from rest. If accelerations of blocks
A and B at any instant (not initially) are a1 and a2, respectively, then
.
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