force and motion

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Across
  1. 5. is an attraction force that acts only over a short range
  2. 6. is associated with charge perticles
  3. 8. is a force acts between any two masses
  4. 9. is the force of gravity acting on an object
  5. 10. is a force that oppose the direction
  6. 11. is the tendency of an object to resist a change
  7. 12. is the constant velocity of a falling object
  8. 17. a push and pull on an object
  9. 18. is a measure of the inertia of an object
  10. 19. is a powerful force of attaction
  11. 20. is the product of an object's mass
  12. 21. is a center-directed force that continuously changes the direction of an object
Down
  1. 1. the friction force the acts on rolling objects
  2. 2. the force that causes a 1 kilogram mass
  3. 3. law stating that the total momentum of a system
  4. 4. is the friction force that acts on objects
  5. 7. is an attractive force that acts between any two masses
  6. 13. fluid friction acting on an object moving through the air
  7. 14. a a force that oppose the motion of object
  8. 15. an overall forces acting on an object
  9. 16. the motion of a falling object