Across
- 1. a piece of wood, metal, etc. 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.
- 2. a rigid bar resting on a pivot, used to move a heavy or firmly fixed load with one end when pressure is applied to the other.
- 3. A wheel with a grooved rim around which a cord passes, which acts to change the direction of a force applied to the cord and is used to raise heavy weights
- 4. plane a sloping ramp up which heavy loads can be raised by ropes or chains
- 5. a short, slender, sharp-pointed metal pin with a raised helical thread running round it and a slotted head, used to join things together by being rotated so that it pierces wood or other material and is held tightly in place
Down
- 1. a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.