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21 Cards in this Set
- Front
- Back
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Acceleration |
The rate of change of velocity, a vector quantity |
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Acceleration of free fall |
The rate of change of velocity of an object falling in a gravitational field |
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Air resistance |
The drag or resistive force experienced by objects moving through air |
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Ammeter |
A device used to measure electric current - it must be placed in series and ideally have zero resisitance |
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Amount of substance |
A measure of the amount of matter in moles |
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Ampère |
The base SI unit of electric current, symbol A |
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Amplitude |
The maximum displacement from the equilibrium position |
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Antiphase |
Particles oscillating completely out of step/phase with each other |
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Archimedes' principle |
The upthrust on an object in a fluid is equal to the weight of the fluid it displaces |
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Average speed |
The rate of change in distance calculated over a complete journey |
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Average velocity |
The change in displacement for a journey divided by the time taken |
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Braking distance |
Distance travelled by a vehicle from the time the brakes are applied until the vehicle stops |
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Breaking strength |
The stress value at the point of fracture, calculated by dividing the breaking force by the cross-sectional area |
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Brittle |
Property of a material that does not show plastic deformation and deforms very little under high stress |
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Cell |
A device that transfers chemical energy into electrical energy |
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Centre of gravity |
An imaginary point at which the entire weight of an object appears to act |
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Centre of mass |
A point through which any externally applied force produces straight-line motion but no rotation |
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Charge carrier |
A particle with charge that moves through a material to form an electric current |
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Closed system |
An isolated system that has no interaction with its surroundings |
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Coherence |
Two wave sources, or waves, that are coherent have a constant phase difference |
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Compression (materials) |
The decrease in length of an object when a conpressive force is applied to it |
