Question

A weight W hangs from a trolley that runs along a rail the trolley moves horizontally through a distance 'p' and
simultaneously raises the weight from 'x' to 'y'. It starts and finishes at rest. How much work is done on the weight
during this process? [Please give FULL explanation ( with attachments, if necessary)]

A. Wp
B. W(p - q)
C. Wq
D. Wr​

Answer 1

Answer:

Explanation:

It's C, because work done = Force applied * distance moved in the direction of force

In this case the force acting on the mass is the tension in the string holding the mass which is equal to the weight in this case. And the distance moved by the weight in direction of this force is q.

So,

work done = W *q

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