Crossword of motion

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Across
  1. 4. A balance beam to lift a object
  2. 7. Helps do work easier
  3. 9. A simple machine that has a inclined plane rapped around a object
  4. 10. A simple machine that reduces friction when moving a object on the ground
  5. 13. A simple machine that lifts heavy objects easier depending on the number of shaft
  6. 14. Work and time divided
  7. 15. What is used to measure force
  8. 17. When two inclined planes meet to make a sharp edge
  9. 18. The direction and speed you are going
Down
  1. 1. What keeps objects moving, and keep them from moving
  2. 2. A simple machine that is a ramp used to go up or down elevation to move something
  3. 3. how fast a object is going
  4. 5. How fast the speed changes over a certain amount of time
  5. 6. When mass and acceleration come together
  6. 8. the scientist who came up with 3 laws of motion
  7. 11. What is used to measure work
  8. 12. The resistance of movement when pushing or pulling
  9. 16. what is used to measure power
  10. 17. The distance and force multiplied together