MACHINES!

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Across
  1. 4. A simple machine that has a bar that pivots at a fixed point
  2. 5. Has a formula: Output force / input force
  3. 7. a simple machine that is a straight , slanted surface
  4. 8. The fixed point of a simple machine's bar!
Down
  1. 1. A simple machine made of a wheel connected to the axle
  2. 2. Any device that helps people do work
  3. 3. Has a formula : Work output / work input x 100%
  4. 6. A simple machine with a Grooved Wheel