Equations to learn Flashcards by Maria serna

Q

workdone (f + d )

A

force x distance moved

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Q

speed

A

distance/time

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Q

acceleration (t)

A

a =(v-u)/t

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Q

force

A

mass x acceleration

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Q

weight

A

mass x gravitational strength

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Q

efficiency

A

useful energy/ total energy used

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Q

momentum

A

mass x velocity

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Q

wave speed

A

frequency x wavelength

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Q

wave speed

A

distance/time

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Q

density

A

mass/volume

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Q

change in gravitational potential energy

A

mass x gravitational strength x change in vertical height

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Q

kinetic energy

A

1/2 x mass x (speed)squared

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Q

power

A

work done / time

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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

A

energy transferred / time

Q

electrical power

A

current x potential difference

Q

electrical power

A

current squared x resistence

Q

force exerted on 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 the surface