Equations Flashcards

0
Q

Speed =

A

Distance/ time

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1
Q

Acceleration =

A

Change in velocity / time

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2
Q

Weight =

A

Mass x gravitational field strength

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3
Q

Force =

A

Mass x acceleration

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4
Q

Momentum =

A

Mass x velocity

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5
Q

Moment =

A

Force x distance from perpendicular pivot

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6
Q

Electrical power =

A

Current x voltage

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7
Q

Voltage =

A

Current x resistance

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8
Q

Charge =

A

Current x time

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9
Q

Wavespeed =

A

Frequency x wavelength

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10
Q

Refractive index =

A

Sin angle I/sin angle r

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11
Q

Sin C =

A

1/ refractive index

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12
Q

Efficiency =

A

Useful energy output/ total energy output

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13
Q

Work done =

A

Force x distance moved

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14
Q

Power =

A

Work done/ time

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15
Q

Kinetic energy =

A

1/2 x mass x speed2

16
Q

GPE =

A

Mass x g x height

g is always 10 m/s2

17
Q

Density =

A

Mass/volume

18
Q

Pressure =

A

Force/area

19
Q

Pressure difference =

A

Height x density x g

g is always 10 m/s2

20
Q

Input (primary) voltage / output (secondary) voltage =

A

Primary turns / secondary turns

21
Q

Potential difference =

A

Energy difference / charge

22
Q

Momentum before =

A

Momentum after

23
Q

Total clockwise =

A

Total anticlockwise

24
Q

(pressure x volume) P1 x V1=

A

P2 x V2

constant

25
Q

Kelvins =

A

Degrees + 273

26
Q

Force acting =

A

Change in momentum/ time take for change

27
Q

Energy transferred =

A

Current x voltage x time

28
Q

Frequency =

A

1/time period

29
Q

Energy transferred =

A

Work done

30
Q

Input power (Vp x Ip) =

A

Output power (Vs x Is)

For 100% efficiency