A uniform chain of length l and mass m is placed in 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 into the table is |
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(a) |
mgl |
(b) |
mgl |
(c) |
mgl |
(d) |
mgl |

A uniform chain of length l and mass m is placed in 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 into the table is |
|||||||

(a) |
mgl |
(b) |
mgl |
(c) |
mgl |
(d) |
mgl |

127