Equations Flashcards

1
Q

Acceleration

A

Change in velocity
————————-
Time Taken

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2
Q

Charge flow

A

Current x time

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3
Q

Power (work done)

A

Work done
—————
Time

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4
Q

Power (energy)

A

Energy transferred
—————————
Time

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5
Q

Weight

A

Mass x gravitational field strength x height

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6
Q

Work done

A

Force x distance

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7
Q

Force applied to a string

A

Spring constant x extension

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8
Q

Energy transferred (power)

A

Power x time

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9
Q

Energy transferred (charge flow)

A

Charge flow x potential difference

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10
Q

Power (current)2

A

(Current)2 x resistance

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11
Q

Power (potential difference)

A

Potential difference x current

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12
Q

Pressure

A

Force normal to a surface
————————————
Area of that surface

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13
Q

Wave speed

A

Frequency x wavelength

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14
Q

Kinetic energy

A

0.5 x mass x (velocity)2

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15
Q

Gravitational potential energy

A

Mass x gravitational field strength x height

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16
Q

Efficiency (energy transfer)

A

Useful output energy transfer
————————————
Total input energy transfer

17
Q

Efficiency (power)

A

Useful power output
—————————
total power input

18
Q

Density

A

Mass
———-
Volume

19
Q

Resultant force

A

Mass x acceleration

20
Q

Momentum

A

Mass x velocity

21
Q

Distance travelled

A

Speed x time

22
Q

Moment of a force

A

Force x distance

23
Q

Potential difference

A

Current x time