A chain of mass `m` and length `l` is kept in three positions as shown below. Assuming (h=0) on the ground find potential energy of chain in all three cases. (a)
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For finding potential energy of chain we will have to see its cetre of mass height `h` from ground. In figuer (a): `h_(c)=0rArr` Potential energy, `U=0` In figure (b): `h_(c)=hrArr` Potential energy, `U=mgh` In figure (c) : `h_(c)=1/2rArr` Potential energy, `U=mg1/2` .
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