Chapter 4, Problem 7STP

To determine

To Choose: The correct option.

Answer to Problem 7STP

Option C:The gravitational potential energy of an Earth-dictionary system is $\underset{\_}{98\text{ J}}$

Explanation of Solution

Given:

Mass = $5.0\text{ kg}$

Height = $\text{2}\text{.0 m}$

Formula used:

Gravitational potential energy is given by,

$GPE=mgh$

where $m$ is mass, $g$ ( $\text{9}\text{.8 N/kg}$ ) is gravity and $h$ is height.

Calculation:

Gravitational potential energy is calculated as:

$\begin{array}{l}GPE=mgh\\ =(5.0\text{ kg)(9}\text{.8 N/kg)(2}\text{.0 m)}\\ =98\text{ Nm}\\ =98\text{ J}\end{array}$

Conclusion:

The gravitational potential energy of an Earth-dictionary system is $\underset{\_}{98\text{ J}}$