Equations Flashcards by Lara Robinson

Q

How would you calculate kinetic energy?

A

1/2 x mass x speed^2

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Q

How would you calculate GPE?

A

mass x gravitational field strength x height

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Q

How would you calculate power, using time?

A

work done/time taken

OR

energy transferred/time taken

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Q

How would you calculate efficiency?

A

useful energy output/total energy output

OR

useful power output/total power output

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Q

How would you calculate charge flow?

A

current x time

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Q

How would you calculate potential difference?

A

current x resistance

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Q

How would you calculate total resistance?

A

resistance of component 1 + resistance of component 2

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Q

How would you calculate power using potential difference?

A

current x potential difference

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Q

How would you calculate power using resistance?

A

(current)^2 x resistance

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Q

How would you calculate energy transferred?

A

power x time

OR

charge flow x potential difference

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Q

How would you calculate density?

A

mass/volume

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Q

How would you calculate wave speed?

A

frequency x wavelength

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Q

How would you calculate weight?

A

mass x gravitational field strength

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Q

How would you calculate work done?

A

force x distance moved along the line of action

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Q

How would you calculate force?

A

spring constant x entension

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Q

How would you calculate moment of a force?

A

force x distance perpendiculat to direction

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Q

How would you calculate pressure?

A

force normal to a surface/area of that surface

Q

How would you calculate distance travelled?

A

speed x time

Q

How would you calculate acceleration?

A

change in velocity/time

Q

How would you calculate resultant force?

A

mass x acceleration

Q

How would you calculate momentum?

A

mass x velocity

Q

What is the equation for kinetic energy?

A

EK = 1/2mv^2

Q

What is the equation for GPE?

A

EP = mgh

Q

What is the equation for power, using work done?

A

P = W/t

What is the equation for charge flow?

Q = I x t

What is the equation for potential difference?

V = I x R

What is the equation for total resistance?

RT = R1 + R2

What is the equation for power, using potential difference?

P = I x V

What is the equation for power, using energy transferred?

P = E/t

What is the equation for power, using resistance?

P = I^2 x R

What is the equation for energy transferred?

E = P x t OR E = QV

What is the equation for density?

ρ = m/V

What is the equation for wave speed?

v = f x λ

What is the equation for weight?

W = m x g

What is the equation for work done?

W = F x s

What is the equation for force?

F = k x e

What is the equation for moment of a force?

M = F x d

What is the equation for pressure?

p = F/A

What is the equation for distance travelled?

s = v x t

What is the equation for acceleration?

a = Δv/t

What is the equation for resultant force?

F = m x a

What is the equation for momentum?

p = m x v