Question

A 4.0 kg ceiling fan is placed 2.5 m above the floor. What is thegravitational potential energy of the Earth-ceiling fan system relative tothe floor? (hint: PE= mgh, g= 10 m/s2)A. 5JB. 100 JC. 16.5JD. 1000 J

Answer 1

Given data:

The mass of ceiling fan is m=4 kg.

The height above the floor is h=2.5 m.

The value of g is g=10 m/s².

The potential energy can be calculated as,

$\begin{gathered} PE=mgh \\ PE=(4)(10)(2.5) \\ PE=100\text{ J} \end{gathered}$

Thus, the potential energy of the Earth-ceiling system is 100 J.