Physics Equations Flashcards by Danielle Smith | Brainscape

Q

Distance travelled

A

Average speed x time

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Q

Acceleration

A

Change in velocity / time taken

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Q

Force

A

Mass x acceleration

Also known as Newton’s Second Law

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Q

Weight

A

Mass x gravitational field strength

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Q

Momentum

A

Mass x velocity

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Q

Gravitational potential energy

A

Mass x gravitational field strength x change in vertical height

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Q

Kinetic energy

A

1/2 x mass x velocity^2 (squared)

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Q

Efficiency

A

Useful energy transferred / total energy supplied

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Q

Wave speed (two equations)

A

Frequency x wavelength

Or

Distance / time

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Q

Work done

A

Force x distance moved in direction of the force

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Q

Power (two equations)

A

Work done / time taken

Or

Energy transferred / potential difference

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Q

Moment of a force

A

Force x distance to normal

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Q

Energy transferred

A

Charge x potential difference

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Q

Charge

A

Current x potential difference

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Q

Potential difference

A

Current x resistance

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Q

Resistance

A

Potential difference / current

Q

Electrical power (two equations)

A

Current x potential difference

Or

Current^2 x resistance

Q

Density

A

Mass / volume

Q

Force on a spring

A

Spring constant x extension

Q

Pressure

A

Force normal to surface / area of surface