Science Puzzle

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Across
  1. 3. A course along which someone or something moves
  2. 6. The rate at which someone or something is able to move or operate
  3. 7. An amount of space between two things or people
  4. 8. A wheel with a grooved rim around which a cord passes
  5. 9. Hold and exert force on something to cause it to move along in front of one
  6. 11. The resistance that one surface or object encounters when moving over another
  7. 13. A triangular shaped tool to separate two objects
  8. 14. A sloping ramp up which heavy loads can be raised by ropes or chains
  9. 15. The action or process of moving or being moved
  10. 17. The speed of something in a given direction
  11. 18. Exert force on someone or something so as to cause movement toward oneself
  12. 19. Strength or energy as an attribute of physical action or movement
  13. 20. The quantity of motion of a moving body, measured as a product of its mass and velocity
Down
  1. 1. Resistance to change in some other physical property
  2. 2. Increase in the rate or speed of something
  3. 4. The moving of something from its place or position
  4. 5. Machine with rigid bar pivoted on a fixed point and used to transmit force
  5. 10. Lifting machine with a rope that unwinds from a wheel on to a cylindrical drum joined to the wheel
  6. 12. A basis or standard for evaluation, assessment, or comparison
  7. 16. A type of fastener used to hold two things together