This document defines key concepts related to motion including motion, reference point, frame of reference, speed, force, balanced forces, and unbalanced forces. Motion is defined as an object changing position over time compared to a reference point. Speed is the distance an object travels due to force over time. Balanced forces are equal and opposite forces resulting in no net force and no change in motion, while unbalanced forces are unequal forces resulting in a net force and change in speed or direction.

1. Motion • When an object changes position over time in comparison to a reference point.

2. Reference Point • A point from which motion can be determined.

3. Frame of reference A viewpoint or perspective in which motion occurs; can be different from others because it is based on your position.

4. Speed The distance an object travels due to force over time. (A rate used to explain motion) Speed = distance / time

5. Force • A push or pull on an object.

6. Balanced Forces Forces equal and opposite of each other resulting in zero net force. (*No change in Motion)

7. Unbalanced Forces Are unequal forces resulting in a change in speed and/or direction of motion. (*Results in a Net Force)