A frictionless pulley is attached to one arm of a balance and a string passed around it carries two masses m1 and m2 . The pulley is provided with a clamp due to which m1 and m2 do not move w.R.T. Each other. Q.18 on removing the clamp, m1 and m2 start moving. How much change in counter mass has to be made to restore balance?
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zero because it is frictionless
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