Across
- 3. forces are balanced with a net force of zero
- 5. when there is no motion between surfaces
- 11. force on an object is the perpendicular contact force that a surface exerts on an object.
- 12. every force is part of one of these pairs
- 14. type of friction that involves motion
- 18. has magnitude and direction
- 19. the measure of the amount of matter in an object
Down
- 1. Force does not involve physical contact
- 2. is an attractive force between any two objections that acts in a direction of a line connecting the centers of the objects and is proportional to the objects masses
- 4. all surfaces are rough; even those that appear to be smooth are rough at this level
- 6. gravitational force depends on mass and
- 7. this type of force results in acceleration
- 8. tendency of an object to preserve its state
- 9. push or pull
- 10. diagram shows forces interacting in a system
- 13. a quantity such as temperature; that does not include direction
- 15. unit of measure for force
- 16. Law indicates for an action there is an opposite reaction
- 17. Greek letter indicating change