MACHINES

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Across
  1. 3. is a simple machine that has a grooved wheel that holds a rope or cable
  2. 5. is a comparison of a machine's work output with the work input
  3. 6. is a simple machine that is made of a wheel connected to a smaller cylindrical object, the axle.
  4. 7. is any device that helps people do work by changing the way work is done
Down
  1. 1. is a fixed point on a lever
  2. 2. is the number of times the machine multiplies the input force
  3. 4. is a simple machine that has a bar that pivots at a fixed point