1. Determining Net Force page 91

2. Net Force a combination of all of the forces acting on an object. Forces in the same direction are added Forces in opposite directions are subtracted.

3. Balanced Forces if there is a net force of zero, then the forces are BALANCED. Balanced Forces do NOT change the motion of an object. (Doesn’t start or stop moving).

4. Unbalanced Forces if the net force is NOT zero, then the forces are UNBALANCED. Unbalanced Forces cause the motion of an object to change. (Starts or stops moving, or changes direction).

6. Newtons (N) unit of force 1N= 1kg · m/s 2 measure with a spring scale