Simple Machines

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Across
  1. 2. An inclined plane wrapped around a central cylinder.
  2. 4. A rigid bar that is free to turn about a fixed point called the fulcrum.
  3. 5. A pulley is a grooved wheel that turns around an axle (fulcrum), and a rope or a chain is used in the grove to lift heavy objects.
Down
  1. 1. an inclined plane that tapers to a sharp edge. It is used to increase force.
  2. 3. It is a modified lever and has a wheel connected to a rigid pole.