Physics stuff

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Across
  1. 1. Force that resists movement of an object when its moving
  2. 6. retainment of energy in the system
  3. 9. Type of force named after the guy who mathematically discovered gravity
  4. 11. Sum of all forces on an object
  5. 12. Unit used in the formula for impulse
  6. 13. a mathematical or physical quantity defined by direction and magnitude
Down
  1. 2. force upon contact
  2. 3. right left up down north west south east are all a _____
  3. 4. Location of an object in space
  4. 5. another word for speed
  5. 7. Force that resist the initial movement of an object
  6. 8. loss of energy in system
  7. 10. the result of multiplying mass times velocity