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Physics AS level > AS Definitions > Flashcards

AS Definitions Flashcards

1
Q

Linear momentum

A

Product of mass and acceleration of the body

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2
Q

Force

A

Rate of change of momentum

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3
Q

Moment of a force

A

Product of force and its perpendicular distance from a point

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4
Q

Torque of a couple

A

Product of one of the forces of a couple and the distance of separation of the forces

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5
Q

Density

A

Mass per unit volume

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6
Q

Pressure

A

Force per unit perpendicular area

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7
Q

Mass

A

Quantity of matter in a body

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8
Q

Centre of gravity

A

Point where all the weight of the body is take to act

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9
Q

Distance

A

Change of position from a fixed point

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10
Q

Displacement

A

Change of position from a fixed point in a straight line

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11
Q

Speed

A

Distance covered per unit time in any direction

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12
Q

Velocity

A

Change of displacement per unit time

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13
Q

Acceleration

A

Rate of change of velocity

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14
Q

Work done

A

The product of force and distance moved in the direction of the force

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15
Q

Kinetic energy

A

Energy of body due to its motion

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16
Q

Elastic potential energy

A

Energy stored in an object due to change of shape

17
Q

Power

A

Work done per unit time

18
Q

Stress

A

Force per unit cross-sectional area

19
Q

Strain

A

Extension unit original length

20
Q

Young Modulus

A

Stress per unit strain

21
Q

Diffraction

A

Spreading of waves into geometrical shaped when incident on a gap

22
Q

Wavelenth

A

Distance between two adjacent water fronts

23
Q

Wave displacement

A

Distance in a specified direction of particle from the equilibrium position

24
Q

Period

A

Time for one oscillation

25
Q

Amplitude

A

Maximum displacement of particles

26
Q

Coherence

A

Waves with constant phase difference

27
Q

Transverse waves

A

Wave with displacement of particles perpendicular to the direction of energy propagation

28
Q

Longitudinal waves

A

Wave with displacement of particles parallel to the direction of energy propagation

29
Q

Doppler effect

A

Change in observed frequency due to a source moving relative to an observer

30
Q

Antinode

A

Position in a stationary wave where the amplitude is maximum

31
Q

Potential difference (p.d)

A

Energy transferred from electrical to other forms per unit charge

32
Q

Electromotive force (e.m.f)

A

Energy transferred from other forms to electrical energy per unit charge

33
Q

Resistance

A

Potential difference per unit current

34
Q

Ohm

A

Volt per unit ampere

35
Q

Electric current

A

Charge per unit time

36
Q

Ampere

A

Coulomb per unit second

37
Q

Volt

A

Joule per coulomb

Physics AS level (1 decks)

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