What is the potential energy of a 2.5 kg book held 2.0 m above the ground?

1 Answer
Nov 25, 2015

49J of energy

Explanation:

Formula for potential energy:
P.E=mgh
m = mass(kg)
g = gravity(m/s^2)
h = height/distance(m)

What is given to you? Well the book is held from the ground of a distance 2.0m, so h=2.0m. Next we know that the book weighs 2.5kg, so m=2.5kg.

Now we just put it in the formula:
PE=(2.5kg)xx(9.8m/s^2)xx(2.0m)
PE=49J