Topic 4 Crossword

3. Place or object used to compare to determine if something is in motion
5. A contact force that two surfaces exert on each other when they rub against each other
10. The rate at which velocity changes
11. The distance the object moves per unit of time
13. If one object exerts a force on another object, then the second object exerts an equal force in the opposite direction
14. The angle of a line on a graph
15. A force that pulls objects toward each other as a result of their masses

1. Resistance to change in motion
2. Unit for the strength of a force
4. The combination of all the forces acting on that object
5. Push or pull exerted on an object
6. An object's mass directly affects how much force is needed to accelerate the object
7. An object at rest remains at rest, and an object in motion remains in motion at constant speed and in a straight line unless acted on by an unbalanced force
8. The speed at which an object travels in a given direction
9. The state in which one object's distance from another object changes
12. A measure of the force of gravity on an object