equations Flashcards by Harriet wasdell

Q

work done

A

work done = force x distance

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Q

kinetic energy

A

kinetic energy = 1/2 x mass x speed^2

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Q

GPE

A

GPE = mass x height x gravity

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Q

power

A

power = work done/time

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Q

efficiency

A

efficiency = useful output / input

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Q

charge

A

charge = current x time

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Q

potential difference

A

potential difference = current x resistance

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Q

power

A

power = potential difference x current

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Q

current

A

current = resistance x potential difference

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Q

energy transferred

A

energy transferred = charge flow x potential difference

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Q

density

A

density = mass / volume

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Q

moment

A

moment = force x distance

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Q

distance

A

distance = speed x time

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Q

acceleration

A

acceleration = change in velocity/ time taken

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Q

weight

A

mass x gravity

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Q

force

A

force = spring constant x extension mass x acceleration

Q

momentum

A

momentum = mass x velocity

Q

pressure

A

pressure = force/area

Q

wave speed

A

wave speed = frequency x wavelength