Question

A backpack has a mass of 8 kg. It is lifted and given 54.9 J of gravitational potential energy. How high is it lifted? Acceleration due to gravity is g = 9.8 m/s2.

 A.6.9 m B.0.15 m C.3.2 m D.0.7 m

Answer 1

PE = mgh
54.9 J = (8 kg)(9.8 m/s²)h
h = 0.7 m