Question

a bucket containing water (total mass M) is pulled from a depth h using a uniform rope of mass m and length l, work done=?​

Answer 1

Answer:

Work done by the person is the change in potential energy of the bucket and the rope.

Given, the rope has a uniform mass m. So the center of mass for the rope is at half of the length of the rope.

So, it will be at a distance h/2 from the bottom.

Work done = Change in PE of bucket+Change in PE of rope

W=Mgh+h/2 = (M+ m/2)gh

Hope it helps u ,

Answer 2

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