A chain of length l and mass m is slowly pulled at constant speed up over the edge of a table by a force parallel to the surface of the table. Assuming that there is no friction between the table and chain calculate the work done by force till the chain reaches to the horizontal surface of the table
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Answered by
46
work done to move the chain up on the table is given as change in the potential energy of the chain
Here initially whole chain of length L is suspended at the edge of the table
now the chain will bring up on the table so its potential energy is taken for whole mass on the table at final position
Now we can say that
final potential energy - initial potential energy = work done
Now work done is
So above is the work done to pull the chain
Answered by
22
here we will apply the concept of centre of mass and conservation of energy
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