An object of mass 4 kg is raised to height of 5 m above the ground. What is its potential energy ? If the object is allowed to fall, find its kinetic energy when it is half way down.
A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620j, its velocity at this position is (g = 10 ms^(-2))
A body of mass 10 kg is raised from certain depth. By the time is raised by 10m, if its velocity is 2ms^(-1) , work done during this time is,
Two particles of masses in th ration 1:2 are placed along a verttical line . The lighter particle is raised through a height of 9 cm. To raise the centre of mass of the system by 2 cm, the heavier particle should be
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