Force & Motion Unit Vocabulary

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Across
  1. 4. ______________ is when an object's speed does not change.
  2. 8. The law of ____________________ states that when a force acts on an object, the object accelerates in the direction of the force. If the mass of an object is held constant, increasing force will increase acceleration. If the force on an object remains constant, increasing mass will decrease acceleration. In other words, force and acceleration are directly proportional, while mass and acceleration are inversely proportional.
  3. 10. The amount of matter of an object.
  4. 13. The resistance that one surface or object encounters when moving over another.
  5. 14. The total distance traveled divided by the total time elapsed.
  6. 15. ______________ are two forces that exert the same amount of force on an object, causing no change in motion.
  7. 17. The _____________________ of an object is defined as the limiting value of the average velocity of the object in a small time interval around that instant.
  8. 19. The _______ definition states that it is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
  9. 20. An _______________ is one that is not opposed by an equal and opposite force operating directly against the force intended to cause a change in the object's state of motion or rest.
Down
  1. 1. The acceleration in the direction that this force is applied.
  2. 2. Acceleration in a direction opposite to the velocity.
  3. 3. The rate at which someone or something is able to move or operate.
  4. 5. The law of ______-________ states that when a force acts on an object, the object accelerates in the direction of the force. If the mass of an object is held constant, increasing force will increase acceleration. If the force on an object remains constant, increasing mass will decrease acceleration. In other words, force and acceleration are directly proportional, while mass and acceleration are inversely proportional.
  5. 6. The action or process of moving or being moved.
  6. 7. The sum of all the forces acting on an object.
  7. 9. The rate of change of velocity per unit of time.
  8. 11. The An object at rest will stay at rest, forever, as long as nothing pushes or pulls on it. An object in motion will stay in motion, traveling in a straight line, forever, until something pushes or pulls on it.
  9. 12. The creator of the three laws of motion that we still use today.
  10. 16. The push or pull on an object.
  11. 18. S=D/T