1. Gravitational Potential Energym h
Ep = mgh
Ep - gravitational potential energy
h - Change in height
m - Mass
g N/kg on Earth

2. What is the potential energy of a 4. 5 kg bowling ball, 13
What is the potential energy of a 4.5 kg bowling ball, 13.5 cm above the ground?
Ep = mgh, h = .135 m
Ep = (4.5 kg)(9.81 N/kg)(.135 m) =
(6.0 J)
6.0 J

3. Toby Continued lifts a 75. 0 kg box doing 1573 J of work
Toby Continued lifts a 75.0 kg box doing 1573 J of work. What is the change in height of the box?
Ep = mgh
h = Ep/(mg) = (1573 J)/(75 kg)/(9.81 N/kg)
= …
2.14 m

4. Colin Host lifts himself up 15 m doing 9555 J of work. What is his mass?
Ep = mgh
m = Ep/(gh) = (9555 J)/(9.81 N/kg)/(15 m)
= …
65 kg