One radian is the angle subtended at the centre of a circle by an arc of length equal to the circle's radius.
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The period T of an object.
The period T of an object in circular motion is the time taken to complete one revolution.
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Centripetal acceleration.
The centripetal acceleration a of an object travelling in a circle of radius r with constant speed v is given by a = v^2/r in a direction towards the centre of the circle.
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Gravitational field strength.
The gravitational field strength at any point is the force acting per unit mass at that point.
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Gravitational force of attraction.
The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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Keplar's third law.
States that the period of a planet squared equals the mean radius of its orbit cubed.
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Displacement.
The distance an object has moved from its mean position.
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Amplitude.
The maximum displacement.
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Frequency.
The number of oscillations per unit time at any point.
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The period of a wave.
The period is the time for one complete pattern of oscillation to take place at any point.
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Damping.
Deliberately reducing the amplitude of an oscillation.
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Resonance.
The build-up of a large-amplitude oscillation when the frequencies of vibrating objects match.
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Other cards in this set
Card 2
Front
The period T of an object in circular motion is the time taken to complete one revolution.
Back
The period T of an object.
Card 3
Front
The centripetal acceleration a of an object travelling in a circle of radius r with constant speed v is given by a = v^2/r in a direction towards the centre of the circle.
Back
Card 4
Front
The gravitational field strength at any point is the force acting per unit mass at that point.
Back
Card 5
Front
The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
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