Simple Machines

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Across
  1. 4. The distance between fulcrum and load.
  2. 5. A simple machine made of wood which is a combination of two inclined planes.
  3. 7. A ___ is a rigid bar or rod that can move about a fixed support.
Down
  1. 1. A slanting surface which connects two points at different heights so that heavier objects move easily.
  2. 2. A ____ consists of a wheel with a grooved rim in which a rope or chain can run.
  3. 3. A type of inclined plane wound around a rod spirally making a number of turns on it.
  4. 6. Force applied by the machine.