physics Flashcards by lakica nicole

Q

acceleration

A

change in velocity/time taken(m/s^2)

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Q

acceleration of freefall

A

gradient/2

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Q

change in pressure

A

density x acceleration due to gravity x depth

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Q

kelvin to celsius

A

K= 0(c) + 273

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Q

density

A

mass/volume

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Q

efficiency

A

useful energy output/ total energy input

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Q

energy transferred

A

current x p.d x time

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Q

kinetic energy

A

1/2 x mass x velocity^2

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Q

gravitational potential energy

A

mass x gravity x height

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Q

impulse

A

force x time force acts or ft=m(v-u)

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Q

moment

A

distance x force

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Q

momentum

A

mass x velocity

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Q

percentage effieceny

A

useful output/total input x 100

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Q

power

A

workdone/time or energy transfered/time or current x p.d

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Q

power loss

A

current^2 x resistance

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Q

p.d

A

work done/ charge

Q

constant

A

pressure x volume

Q

resultant force

A

change in momentum/ unit time

Q

spring constant

A

force/extenstion

Q

weight

A

mass x gravity

Q

work done by force

A

force x distance moved