Two blocks A and B of masses m and 2m respectively pass over a pulley and are held at rest such that the spring is in natural length. Find out the accelaration of the blocks just after the release. Options are- ( for A and B respectively in order)-
a)both are g(9.8 m/s^2) downwards
b)g/3 upwards,g/3 downwards
c)0,0
d)g downwards, constant velocity

Question

Two blocks A and B of masses m and 2m respectively pass over a pulley and are held at rest such that the spring is in natural length. Find out the accelaration of the blocks just after the release. Options are- ( for A and B respectively in order)-
a)both are g(9.8 m/s^2) downwards
b)g/3 upwards,g/3 downwards
c)0,0
d)g downwards, constant velocity

anonymous · Answer

I don't get the question...what is attached to the spring??

anonymous · Answer

here dont worry that the springs are there instead of strings
the restoring force will cancel out the weight's effect on spring(action-reaction forces)
so just the normal case
my intuition shud tell me taht the 2m mass pulls more so it will accelerate the system downwards
m will be pulled upwards
now just to prove that the acceleartion of system =a=g/3
u can do it 
ask me if u have doubts

anonymous · Answer

alwways draw the free-body diagram first!

anonymous · Answer

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