Work, Power and EnergyHard
Question
One end of a light rope is tied directly to the calling. A man of mass M initially at rest ground starts climbing the rope hand over hand up to a height l.From the time he starts at rest on the ground to the time he is hanging at rest at a height l, how much work much work was on the man by the rope
Options
A.0
B.Mgl
C.- Mgl
D.It depends on how fast the man goes up.
Solution
Total work done on man = 0 ⇒ Work done by string = - 0 work done by gravity = - (- Mgl) = Mgl
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