Unit 1: Forces and Motion Vocabulary

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Across
  1. 4. The speed of an object in a particular direction.
  2. 5. The force with which an object’s mass is pulled toward the center of Earth.
  3. 7. The unit used to measure force. One newton is the force needed to accelerate a one-kilogram object at one meter per second squared: 1 N = 1 kg · m/s².
  4. 9. A push or pull that acts on an object.
  5. 11. The attractive force that acts between two masses.
  6. 14. A change in an object’s speed, direction, or both.
  7. 15. Resistance The force that air exerts on an object as it falls or moves through the air.
Down
  1. 1. A force that opposes the motion of objects that touch as they move past each other.
  2. 2. A state of equilibrium in which the forces acting on an object cancel each other out; also known as a zero resultant force.
  3. 3. The ratio of the distance an object moves to the amount of time it moves.
  4. 6. Velocity The point at which the force of air resistance acting on a falling object is equal to the force of gravity acting on it.
  5. 8. The quantity of motion an object has. Momentum is calculated by multiplying an object’s mass by its velocity.
  6. 10. The amount of matter in an object.
  7. 12. The tendency of an object to resist a change in its motion.
  8. 13. Field The area in which a force can be felt.