MACHINES

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Across
  1. 4. (TWO WORDS-NO SPACES)A machine made up of several simple machines.
  2. 5. (TWO WORDS-NO SPACES)A device used to do work.
  3. 7. (THREE WORDS-NO SPACES) A simple machine composed of two objects that turn in a circular motion on the same center, multiplying both force and speed.
  4. 10. The pull that Earth has on you and all other objects.
  5. 11. A wheel with teeth.
  6. 12. The force needed to be overcame to do work.
Down
  1. 1. An object on which another object turns.
  2. 2. (TWO WORDS-NO SPACES)The number of times a machine multiplies your effort.
  3. 3. A push or pull
  4. 6. A bar that turns on a pivot.
  5. 7. A force that causes objects to move.
  6. 8. The force needed to do work.
  7. 9. The force between surfaces that touch each other.