simple machines

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Across
  1. 4. rate of change
  2. 5. was a wheel and rope to move heavy objects
  3. 6. two inclined planes that are back to back
  4. 7. the distance an object travels in a certain am-out of time
  5. 9. speed of an object, but also direction also
Down
  1. 1. the axle is the rod the hold the wheels together
  2. 2. was free to move something
  3. 3. plane a aid that can be used ti raise or lower things
  4. 7. an inclined plane that is wrapped around with a flat led on one end
  5. 8. when an object changes place or position