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# (II) Recall from Chapter 4, Example 4-14, that you can use

ISBN: 9780130606204 3

## Solution for problem 25Q Chapter 6

Physics: Principles with Applications | 6th Edition

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Problem 25Q

(II) Recall from Chapter 4, Example 4-14, that you can use a pulley and ropes to decrease the force needed to raise a heavy load (see Fig. 6-37). But for every meter the load is raised, how much rope must be pulled up? Account for this, using energy concepts.

Step-by-Step Solution:

Step-by-step solution

Step 1 of 2</p>

The work done by the person pulling must be equal to the work done on the piano. From the figure we have:

If the load is raised by 1 m the displacement of the rope will be x.

The work done is:

For every 2m of rope that is pulled up, the load rises by 1 m.

Step 2 of 2

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(II) Recall from Chapter 4, Example 4-14, that you can use

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