2. Two tugboats attempt to pull a barge across the harbor. The barge exerts a force of 7500 N north, while the tugboats exert a combined force of 9500 N south. Are the tugboats able to move the barge?

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                                         : )