A bird flying horizontally at 4.25 m/s accidentally drops a rock it was
carrying. A short time later, the
rock's velocity is 13.0 mls at -70.9°
How much time has passed?
(Unit = S)
(Hint: the rock was originally
moving with the bird.)

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 is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.