1. 2. the speed of an object in a given direction
  2. 3. force that results from combining all the forces exerted on an object
  3. 6. rate at which work is done
  4. 8. force that opposes motion between two surfaces that are touching
  5. 11. unit used to express work
  6. 12. a push or pull
  7. 13. property of a moving object that depends on the objects mass and velocity
  8. 15. force of attraction between objects that is due to their masses
  9. 18. tendency of all objects to resist any change of motion
  10. 20. the rate at which an object moves
  11. 21. a measure of the gravitational force exerted on an object
  1. 1. the rate at which velocity changes
  2. 4. the curved path an object follows when thrown
  3. 5. a simple machine consisting of a bar that pivots at a fixed point
  4. 6. amount of force exerted on a given area
  5. 7. when an object changes position over time when compared with a reference point
  6. 9. unit of force
  7. 10. occurs when a force causes an object to move in the direction of the force
  8. 12. any material that can flow and that takes the shape of its container
  9. 14. a device that helps make work easier
  10. 16. unit used to express power
  11. 17. the amount of matter in an object; value does not change
  12. 19. amount of matter in a certain volume or mass per unit