Question

How much energy is required to lift a 9 kg (20 lb) bag of rice from the floor to the trunk of your car located 0.9 meters above the ground? What kind of energy does the rice have when it is sitting in your trunk? To receive full credit, show all of your work in the space below.

Answer 1

Potential energy = mass X acceleration due to gravity X height
= 9 X 10(or 9.8) X 0.9
= 81 J (Joule)