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Physics for the Mad Lads > Equations - all > Flashcards

Equations - all Flashcards

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1
Q

work done

A

work done = force x distance

W = Fs

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2
Q

kinetic energy

A

kinetic energy = 0.5 x mass x (speed)^2

Ek=1/2 m v^2

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3
Q

gravitational potential energy

A

gravitational potential energy = mass x gravity x height

Ep = m g h

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4
Q

power

A

power = work done / time

P = W / t

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5
Q

elastic potential energy

A

kinetic energy = 1/2 mass x speed^2

Ek = 1/2 m v^2

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6
Q

power

A

power = energy transferred / time

P = E / t

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7
Q

efficiency

A

efficiency = useful energy out / total energy in

or

useful power out / total power in

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8
Q

charge

A

charge = current x time

Q = It

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9
Q

potential difference

A

potential difference = current x resistance

V = IR

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10
Q

power

A

power = potential difference x current

P = VI

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11
Q

power

A

power = current^2 x resistance

P = I^2 R

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12
Q

energy

A

energy = power x time

E = Pt

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13
Q

energy

A

energy = charge x potential difference

E = QV

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14
Q

weight

A

weight = mass x gravitational field strength

W = mg

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15
Q

force

A

force = spring constant x extension

F = ke

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16
Q

movement

A

movement = force x distance

M = Fd

17
Q

pressure

A

pressure = force / area

p = F / A

18
Q

pressure

A

pressure = height x density x gravitational field strength

p = h ρ g

19
Q

distance

A

distance = speed x time

s = vt

20
Q

acceleration

A

acceleration = change in velocity / time

a = Δv / t

21
Q

force

A

force = mass x acceleration

F= ma

22
Q

momentum

A

momentum = mass x velocity

p = mv

23
Q

force

A

force = mass x change in velocity / change in time

F= m Δv / Δt

24
Q

period

A

period = 1 / frequency

T = 1 / f

25
Q

velocity

A

velocity = frequency x wavelength

v = fλ

26
Q

magnification

A

magnification = image height / object height

27
Q

density

A

density = mass / volume

ρ = m / v

28
Q

change in thermal energy

A

change in thermal energy = mass specific heat capacity x temp change

ΔE = mcΔθ

29
Q

energy

A

energy = mass x specific latent heat

E = mL

30
Q

constant

A

constant = pressure x volume

pV = constant

31
Q

force

A

force = magnetic flux density x current x length

F = BIl

Physics for the Mad Lads (7 decks)

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