Question

what is energy?

1. what is energy?
2. what is an example of kinetic energy?

(a) a rock sitting at an edge
(b) a flying airplane
(c) a boy taking a break before running again
(d) none of the above

Explanation:

Energy is the ability to do work. Kinetic energy is the energy of motion. A rock sitting at an edge has potential energy, a boy taking a break has no motion - related kinetic energy at that moment. A flying airplane is in motion, so it has kinetic energy.

Answer:

B. a flying airplane