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

1 Answer
Nov 25, 2015

Answer:

#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#