| Across |
| 3. |
A short,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 |
| 5. |
A piece of 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 |
| 7. |
The ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine |
| 10. |
Strength,energy as an attribute of physical action or movement |
| 11. |
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 |
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| Down |
| 1. |
A circular object that revolves on an axle and is fixed below a vehicle or other object to enable it to move over the ground |
| 2. |
A sloping ramp up which heavy loads can be raised by ropes or chains |
| 4. |
A thing made,adapted for a particular purpose, especially a piece of mechanical or electronic equipment |
| 6. |
The resistance that one surface or object encounters when moving over another |
| 8. |
A rod or spindle passing through the centre of a wheel or group of wheels |
| 9. |
The force that attracts a body towards the centre of the earth, or towards any other physical body having mass |
| 12. |
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 |
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