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9L Press & Mom vocab
words used for pressure and moments @AJHS
| Question | Answer |
|---|---|
| altitude sickness | An illness caused by very low air pressure. It can be fatal. |
| antagonistic muscles | Two muscles that work a joint by pulling in opposite directions, eg biceps and triceps. |
| anticlockwise moment | The moment of a force in an anticlockwise direction around a pivot. |
| bends | Another name for decompression sickness. |
| biceps | Muscle found at the front of the arm between the shoulder and elbow. |
| clockwise moment | The moment of a force in a clockwise direction around a pivot. |
| compressed | Squeezed together. |
| contracting | Making something smaller or shorter. |
| decompression sickness | Bubbles in the blood caused if divers come to the surface too quickly. It can be fatal. |
| effort | The force put on a lever to put a force on something else. |
| exert | Push on something. |
| force multiplier | A lever used to turn a small force into a larger one. |
| fulcrum | A point around which something turns. Another name for a pivot. |
| hydraulic | A system which works by transmitting pressure through pipes containing a liquid. |
| in equilibrium | In balance. |
| lever | A simple machine which can increase the size of a force. |
| load | The weight or force on something. |
| machine | Something which alters the size or direction of a force. |
| moment | The turning effect of a force. It is calculated using: moment = force x distance of force from pivot. |
| newton metre (Nm) | The unit for the moment of a force. |
| pascal (Pa) | A unit for pressure. 1 Pa = 1 N/m2. |
| pivot | Another name for a fulcrum. |
| pneumatic | Containing air or gas under pressure, eg tyres. |
| pressure | The force on a certain area, measured in newtons per square metre (N/m2), newtons per square centimetre (N/cm2), or pascals (Pa). |
| principle of moments | The principle of moments states that when something is in equilibrium (in balance), the clockwise moment is equal to the anticlockwise moment. |
| radius bone | The bone in the forearm that the biceps muscle pulls on. |
| triceps | Muscle found at the back of the arm between the shoulder and elbow. |
| turning effect | The moment of a force. The way in which a force turns something around a pivot. |
Created by:
johncl
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