Vectortine's Day

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Across
  1. 2. If an object is not acceleration then forces action upon this object must be ___?
  2. 7. The tendency to resist acceleration or change
  3. 8. The law of motion
  4. 10. The act of one surface or object rubbing against another surface or object
  5. 11. A force is not a scalar quantity but rather?
  6. 13. A vector quantity measured in m/s
Down
  1. 1. Increases the force of inertia
  2. 3. Always opposes the friction force
  3. 4. How much net force is required to keep an object moving with constant speed
  4. 5. For an acceleration to occur there must be a ___?
  5. 6. What kind of the two types of forces does gravity go under?
  6. 8. What is force measured in
  7. 9. The strongest type of friction
  8. 12. A push or pull
  9. 14. Which of Newton's three laws say for every action there is an equal but opposite reaction