Answer to Question #294454 in Physics for LUNA

Question

A 5-kg box is dropped from a height of 68 m. What is the potential energy of the ball? Assuming that the reference position is the ground. 

Answer 1

Given:

$m=\rm 5\: kg$

$h=68\:\rm m$

The potential energy of the ball is given by

$$E_p=mgh\\ =\rm 5\:kg*9.8\: N/kg*68\: m=3332\: J$$