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Across
  1. 3. The tendency of an object to resist changes in its state of motion
  2. 5. A push or pull acting upon an object, typically measured in Newtons
  3. 7. The pair of forces acting in opposite directions, often used to describe Newton's third law.
Down
  1. 1. The rate of change in an object's velocity
  2. 2. The amount of matter in an object, which determines its inertia and resistance to acceleration.
  3. 4. The speed of an object in a specific direction.
  4. 5. A force that opposes motion between surfaces in contact.
  5. 6. The force of gravity acting on an object.