Across
- 3. a sloping ramp up which heavy loads can be raised by ropes or chains
- 5. a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them
- 7. a machine consisting of a rope that unwinds from a wheel onto a cylindrical drum
- 8. a short, slender, sharp-pointed metal pin with a raised thread running around it
Down
- 1. a machine that has a wheel over which a pulled rope or chain runs to change the direction of the pull used for lifting a load
- 2. a rigid bar resting on a pivot used to help move a heavy load
- 4. a machine consisting of two or more simple machines operating together
- 6. the point on which a lever rests