Chapter 4, Problem 52R

To determine

To calculate: Work needed to lift a book.

Answer to Problem 52R

Work done is $\underset{\_}{40\text{ J}}$ .

Explanation of Solution

Given:

Force = $20\text{ N}$

Distance = $2\text{ m}$

Formula used:

Work done is given by,

$W=Fd$

Where $F$ is force and $d$ is distance.

Calculation:

Work done is calculated as:

$\begin{array}{l}W=Fd\\ =(20\text{ N)(2 m)}\\ =40\text{ J}\end{array}$

Conclusion:

Work done is $\underset{\_}{40\text{ J}}$ .