Equations Flashcards by Alina Abbas

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

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Q

Weight

A

mass x gravitational field strength

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Q

Efficiency

A

useful energy out / total energy

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Q

Momentum

A

mass x velocity

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Q

Wave speed

A

distance / time

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Q

Wave speed (frequency)

A

frequency x wavelength

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Q

Density

A

mass / volume

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Q

Work done

A

force x distance moved in direction of force

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Q

Change in gravitational potential energy

A

mass x gravitational field strength x change in vertical height

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Q

Kinetic energy

A

0.5 x mass x (speed) squared

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Q

Power

A

work done / time taken

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Q

Energy transferred

A

charge moved x potential difference

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Q

Charge

A

current x time

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Q

Potential difference

A

current x resistance

Q

Power (energy)

A

energy transferred / time taken

Q

Electrical power (difference)

A

current x potential difference

Q

Electrical power

A

current squared x resistance

Q

Force exerted on a spring

A

spring constant x extension

Q

Moment of a force

A

force x distance normal to the direction of the force

Q

Pressure

A

force normal to surface / area of that surface