What is the gravitational potential energy of a # 7 kg# object on a shelf # 2/5 m # high?

1 Answer
Dec 19, 2015

Answer:

27.44 Joules

Explanation:

The formula for gravitational potential energy is #E=mgh#, where #m# is the mass of an object, #g# is the gravitational field strength it experiences and #h# is its height above a known level.

In this calculation I'm assuming the gravitational field strength #g=9.8 ms^-2#.

#E=7*9.8*2/5=27.44 J#

This is the amount of work that would have to be done to lift the object from ground level onto the shelf.