Across
- 4. A place or object used to determine whether something moved
- 7. A noncontact force that pulls objects toward Earth
- 8. A push or pull that occurs when objects touch
- 11. Motion described according to the reference point used
- 13. What the arrowhead on a force arrow represents
- 15. A push or a pull
Down
- 1. A push or pull that acts without objects touching
- 2. Equal and opposite forces with a net force of zero
- 3. The SI unit used to measure force
- 5. A change in position compared with a reference point
- 6. Forces with a nonzero net force that can change motion
- 9. A contact force that opposes motion between surfaces
- 10. A type of noncontact force that can attract or repel
- 12. What the length of a force arrow represents
- 14. The combination of all forces acting on an object