Question

A box has a mass of 5.8kg. The box is lifted from the garage floor and placed on a shelf 2.5m off the ground. How much gravitational potential energy does the box have before it falls off the shelf?

A. 142.1 m/s

B. 14.5 J

C. 142.1 J

D. 18.13 J

Answer 1

Gravitational potential energy =

(mass) x (gravity) x (height)

= (5.8 kg) x (9.8 m/s²) x (2.5 m)

= 142.1 Joules (C)