Simple Machines

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Across
  1. 3. a simple machine made of a rigid beam and a fulcrum.
  2. 5. plane is a ramp that assists moving heavy objects up and down heights.
  3. 6. a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits.
Down
  1. 1. a simple machine where a wheel turns around a bar to move objects.
  2. 2. a triangular shaped tool, and is a portable inclined plane.
  3. 4. a simple machine and comprises a wheel on a fixed axle, with a groove along the edges to guide a rope or cable.