Question

a 4.5 kg textbook is sitting on a table 0.8 meters above the ground. how much gravitational potential energy does the textbook have? remember : $e_g = mgh$ $g = 10 \frac{m}{s^2}$ $e_g = ? j$

Explanation:

Step1: List given values

$m=4.5\ \text{kg}$, $g=10\ \frac{\text{m}}{\text{s}^2}$, $h=0.8\ \text{m}$

Step2: Substitute into formula

$E_g = mgh = 4.5 \times 10 \times 0.8$

Step3: Calculate the result

$E_g = 45 \times 0.8 = 36$

Answer:

$36\ \text{J}$