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37 Cards in this Set
- Front
- Back
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Physical Quantity |
A numerical magnitude and a unit |
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Scalar Quantity |
Consists of magnitude only |
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Vector Quantity |
Consists of Magnitude and Direction |
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Period |
Time taken to complete one oscillation |
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Acceleration |
Rate of change of velocity |
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Speed |
Rate of change of distance |
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Velocity |
Rate of change of displacement |
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Friction |
A force that opposes the motion between two objects that are in contact with each other |
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Pressure |
Force applied per unit area |
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Mass |
The amount of substances in an object |
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Density |
The mass per unit volume of an object |
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Gravitational Field |
A region where a mass feels a force due to it's weight |
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Moment of Force |
Turning Effect of the force Product of force and the perpendicular distance between the pivot and the line of action of force |
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Principle of Moments |
For a system to be in equilibrium, the sum of anti-clockwise moment is equal to the sum of clockwise moment, about the same pivot. |
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Centre of Gravity |
A single point where it's entire weight seems to act on |
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Stability |
Refers to the ability of an object to return to it's original position after being tilted slightly |
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Energy |
Ability to do work |
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Principle of Conservation of Energy |
Energy cannot be created or destroyed Energy can only be transmitted from one form to another through an object to another The total energy remains the same |
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Brownian Motion |
Irregular motion of smoke particles in air |
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Conduction |
Transfer of thermal energy in a medium, without any flow of the medium |
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Convection |
Transfer of thermal energy in fluids, by means of convection current, due to the density differences in fluids |
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Radiation |
Transfer of thermal equilibrium in means of electromagnetic waves, such as Infrared Radiation, without the aid of a medium |
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Heat |
Transfer of thermal energy |
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Evaporation |
When a liquid changes its state to gas with a decrease in temperature |
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Transverse Waves |
Waves that travel perpendicular to the direction of vibration of particles |
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Wave |
Wave is a disturbance that transfers energy from one point to another and is caused by a vibration |
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Longitudinal Waves |
Waves that travel parallel to the direction of vibration of particles |
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Amplitude |
Maximum displacement from its undisturbed position |
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Crest |
Highest point of a transverse waves |
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Trough |
Lowest point of a transverse waves |
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Wavelength |
The shortest distance between two successful crests |
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Wavefront |
An imaginery line that connects all the points in the same phases |
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Frequency |
Number of complete waves formed in one second |
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Wave Speed |
Distance travelled per unit time |
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Current |
Rate of flow of electric charge through a cross section of a conductor |
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Potential Difference |
Work done is moving a unit charge between these two points |
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Electromotive Force |
Work done by an electrical energy source in moving a unit chatge around a complete circuit |
