Question

An object free falls $15m$ from the top of a ladder. Select the graph that best describes the potential energy of the object during the fall.

• A. A
• B. B
• C. C
• D. D
• E. E

Answer 1

The correct option is A A

Potential energy of a mass $m$ , at a height $h$ is given by ,

$U=mgh$

or $U\propto h$

When object falls down, its height decreases with time and due to this potential energy also decreases (linearly) directly with time, which is shown in graph $A$.