Gravitational Potential Energy m h Ep = mgh Ep - gravitational potential energy h - Change in height m - Mass g - 9.81 N/kg on Earth

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) = 5.959575 (6.0 J) 6.0 J

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) = 2.13795… 2.14 m

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) = 64.9337… 65 kg