forces and motion

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Across
  1. 2. forces applied to an object in opposite directions that are not equal in size
  2. 3. if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force
  3. 9. the speed of something in a given direction
  4. 10. no change in motion
  5. 12. when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction
  6. 13. a large quantity or amount of something.
Down
  1. 1. increase in the rate or speed of something.
  2. 4. the rate at which someone or something is able to move or operate.
  3. 5. the resistance that one surface or object encounters when moving over another.
  4. 6. strength or energy as an attribute of physical action or movement.
  5. 7. the acceleration of an object is directly related to the net force and inversely related to its mass
  6. 8. the unit used for mass
  7. 11. N