What is speed? a. distance (miles or meters) b. time (hours or seconds) c. time per distance (hours per mile or seconds per meter) d. distance per time (miles per hour or meters per second)

i think the answer is a, hope this is right, that would be my best guess.

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                                         : )