Chapter 11, Problem 85A

To determine

Depth of the foam peanuts box.

Answer to Problem 85A

Depth of the foam peanuts box is 5 m.

Explanation of Solution

Given:

Depth of 1-box of foam peanut is 1 m.

Formula used:

Work done is

  $W=Fd=mgh$

Calculation:

The stuntwoman breaks her fall from one-story building by landing on a foam peanuts filled box whose depth is 1 m.

Now she has to jump from a five-story building. The height of the building increased by 5-times.So, the depth of the foam peanuts box has to increase five times as well. The depth of the foam peanuts box will now be

  $\begin{array}{c}{D}_{new}=D\times 5\\ =1\times 5\\ =5\text{m}\end{array}$

Conclusion:

Depth of the foam peanuts box is 5 m.