Across
- 1. a measure of earth's gravitational pull
- 4. force that slows things down
- 5. a bearing in which the parts are separated by a ring of small freely rotating metal balls which reduce friction
- 6. a force that prevents things from moving
- 9. the maximum amount of force that a muscle can exert against some form of resistance in a single effort
- 10. force that attracts any object with mass
- 12. forces that can act on bodies which are not in contact
- 13. the sum of all forces acting on an object
- 14. forces that only act on bodies when they are in contact with the bodies
Down
- 2. force exerted by an object with static electric charge on it
- 3. a push or pull acting upon an object
- 7. amount of matter in am object
- 8. attraction or repulsion that arises between electrically charged particles because of their motion
- 11. the unit of presure