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Physics Equations > Physics Equations > Flashcards

Physics Equations Flashcards

1
Q

Weight

A

Mass x gravitational field strength

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2
Q

Force applied to a spring

A

Spring constant x extension

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3
Q

Acceleration

A

Change in velocity/time taken

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4
Q

Gravitational potential energy

A

Mass x gravitational field strength x height

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5
Q

Power measured in Watts

A

Work done/time
Energy transferred/time
Potential difference x current
Current^2 x resistance

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6
Q

Efficiency

A

Useful power output/total power output

Useful output energy transfer/total input energy transfer

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7
Q

Charge flow

A

Current x time

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8
Q

Energy transferred

A

Power x time

Charge flow x potential difference (voltage)

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9
Q

Density

A

Mass/volume

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10
Q

Work done

A

Force x distance (along line of action of force)

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11
Q

Distance travelled

A

Speed x time

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12
Q

Resultant force

A

Mass x acceleration

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13
Q

Kinetic energy

A

0.5 x mass x speed^2

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14
Q

Wave speed

A

Frequency x wavelength

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15
Q

Potential difference

A

Current x resistance

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16
Q

Pressure

A

Force (to a surface)/area of surface

17
Q

Momentum of a force

A

Force x distance (normal to direction of force)

18
Q

Equation that links energy transferred to specific heat capacity

A

Change in thermal energy = mass x SHC x temperature change

19
Q

Elastic potential energy

A

0.5 x spring constant x extension^2

20
Q

Change in thermal energy

A

Mass x SHC x change in temp

21
Q

Total voltage in a series circuit

A

V1+V2+V3…..

22
Q

Current

A

Voltage/Resistance

23
Q

In a series circuit current is…

A

The same throughout - I1=I2=I3

24
Q

Total resistance in a series circuit

A

R1+R2+R3…..

25
Q

Voltage in a parallel circuit

A

V1=V2=V3…..

26
Q

Total current in a parallel circuit

A

I1+I2+I3…….

27
Q

Density

A

Mass/Volume

28
Q

Energy needed when a substance of mass changes state

A

E= Mass x specific latent heat

29
Q

Moment

A

Force x velocity

30
Q

Pressure at a depth

A

P = Height of the column of liquid x GFS x Density

31
Q

Uniform acceleration

A

final velocity - initial velocity = 2 x acceleration x distance

32
Q

Resultant force

A

Mass x acceleration

33
Q

Force (momentum)

A

F = change in momentum/change in time

34
Q

Period

A

1/frequency

35
Q

magnification

A

image height/object height

36
Q

Force (the motor effect)

A

F = magnetic flux density x current x length

37
Q

Transformer equation

A

Input potential difference/output potential difference = number of turns on primary coil/number of turns on secondary coil

Physics Equations (1 decks)

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