Questions
A uniform chain of length 4m and mass 4 kg is placed on a smooth table with one-fourth of its length hanging over the edge. The work that has to be done to pull the whole chain back onto the table is
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Correct option is A
m = Mass of the hanging part=4×14kg=1 kgDisplacement of c.g. h = 0.5 mwork done =mgh=1×10×0.5 J=5 JSimilar Questions
A simple pendulum is swinging in a vertical plane. The ratio of its potential energies when it is making angles and with the vertical is,
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