physics

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Across
  1. 1. the faster a car goes the air resistance gets ...
  2. 5. an ... is the smallest piece of an element
  3. 6. what was the founder of gravity's name
  4. 9. opposite charges attract, this is a ... motion
  5. 10. the force that resists against any objects moving
  6. 11. ... equals distance divided by time
  7. 14. mass is weighed in ...
  8. 15. the overall effect of more than one force on an object
  9. 17. the last name of the founder of gravity
  10. 18. acceleration equals change in .... divided by time
  11. 19. 10th element in the periodic table
Down
  1. 2. the speed equals the ... of a distance-time graph
  2. 3. something that affects an objects acceleration
  3. 4. the direction that thrust acts upon
  4. 7. what dropped from a tree to give the founder of gravity his idea
  5. 8. if a line is straight on a distance-time graph the object is ...
  6. 12. like charges repel, this is a .... motion
  7. 13. ... equals mass times acceleration
  8. 16. the direction in which weight acts upon