Chapter 4.1, Problem 2PP

To determine

To calculate: the work done in lifting the child.

Answer to Problem 2PP

$\underset{\_}{50\text{ J}}$ work is done in lifting a $100\text{ N}$ child.

Explanation of Solution

Given data:

Weight of the child, $F=100\text{ N}$

Distance moved, $d=0.5\text{ m}$

Formula used:

Work Equation:

  $W=Fd$

Where $W$ is work in joules, $F$ is the applied force in newton and $d$ is the distance moved by the object in meters

Calculation:

As per the problem,

  $\begin{array}{l}F=100\text{ N}\\ d=0.5\text{ m}\end{array}$

Substitute the values of force and distance in the work equation:

  $\begin{array}{l}W=Fd\\ W=(100\text{ N)(0}\text{.5 m)}\\ W=50\text{ J}\end{array}$

Conclusion:

$\underset{\_}{50\text{ J}}$ work is done in lifting a $100\text{ N}$ child.