Across
- 3. a short, slender, sharp-pointed metal pin with a raised helical thread running around 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.
- 4. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.
- 5. Plane simple machine consisting of a sloping surface, used for raising heavy bodies.
- 6. is an object with one pointed edge and one thick edge
Down
- 1. This simple machine involves two circular objects — a larger disc and a smaller cylinder both joined at the center.
- 2. is a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim.