Physics Equations Flashcards by Sarah Telford

Q

average speed

A

distance/ 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 little g

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Q

momentum

A

mass x velocity

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Q

moment

A

force x perpendicular distance from pivot

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Q

power

A

current x voltage

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Q

voltage

A

current x resistance

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Q

charge

A

current x time

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Q

wave speed

A

frequency x wavelength

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Q

efficiency

A

useful energy output/ total energy input

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Q

work done

A

force x distance moved

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Q

gravitational potential energy

A

mass x g x height

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Q

kinetic energy

A

1/2 x mass x speed^2

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Q

energy transferred

A

current x voltage x time

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Q

density

A

mass/ volume

Q

pressure

A

force/ area

Q

pressure difference

A

height x density x g

Q

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

A

primary turns/ secondary turns

Q

input power=

A

output power

Q

Change in momentum

A

Force x time

Q

Snell’s Law/ Refractive index

A

sin(i)/ sin(r)

Q

refractive index

A

1 / sin c