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