Sam lifted his backpack with 5 Newtons of force a total of 400 meters. How much work did he do?
80 watts
2000 watts
2000 joules
80 joules

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

the answer for apex is the lowest