A tennis ball moves 18 meters northward, then 22 meters southward, then 14 meters northward, and finally 28 meters
southward.

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

The two required components for a generator

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical