ALL EQUATIONS :DEVIL: Flashcards

1
Q

Paper1: KE

A

KE = 1/2mv^2

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2
Q

Paper1: GPE

A

GPE = mgh

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3
Q

Paper1: Workdone

A

Work done = force * Distance

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4
Q

Paper1: Power energy transfer

A

Power(Watts) = Energy transferred(Joules)/Time

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5
Q

Paper1: Power for work done

A

P = Work done/time

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6
Q

Paper1: Efficiency energy/power

A

useful energy output/total energy input for energy

and for power: useful power output / total power input

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7
Q

Paper1: Charge flow

A

Q = It or Charge(Coulombs) = Current x time

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8
Q

Paper1: Potential Difference

A

V = IR or Voltage = Current x Resistance

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9
Q

Paper1: Power using voltage

A

P = VI or Power = Potential difference x current

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10
Q

Paper1: Power using resistance

A

P = I^2 x R or current squared x resistance

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11
Q

Paper1: Energy transferred using power

A

E = Pt or Energy transferred = Power x time

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12
Q

Paper1: Energy transferred using charge

A

E = QV OR Energy transferred = Charge x Potential Difference

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13
Q

Paper1: Density

A

p = m/V or Density(kg/m^3) = mass/ Volume

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14
Q

Paper1: Specific Heat Capacity

A

E = mc0 or change in thermal energy = mass x specific heat capacity x temp change

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15
Q

Paper1: Specific Latent Heat

A

E = mL or Energy transferred = mass x specific latent heat

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16
Q

Paper1: weight

17
Q

Paper1: Force (Hooke’s Law)

A

F = ke or Force = spring constant(N/m) x Extension

18
Q

Paper1: Moment of a force

A

M = Fd or Moment(Nm) = Force x Distance

19
Q

Paper1:Pressure for Liquids and Solids

A

Pressure in pascals = force / area

20
Q

Paper1:Pressure in a liquid

A

p = hpg or Pressure = depth x Density (kgm^3) x Gravitational field strength

21
Q

Paper1:Acceleration

A

Acceleration = Change in velocity/ Time

22
Q

Paper1:Newtons Second Law

23
Q

Paper1:Momentum

A

P = mv or Momentum = mass(kg) x velocity(m/s)

24
Q

Paper1:Force(Momentum Change)

A

F = Change in momentum / Time

25
Q

Paper2: Distance, Speed, and Time

A

Speed = Distance/Time

26
Q

Paper2: Acceleration

A

Acceleration = Change in velocity/ time

27
Q

Paper2: Newton’s Second Law (Force, Mass, Acceleration):

A

Force = Mass x Acceleration

28
Q

Paper2: Momentum:

A

Momentum - mass x velocity

29
Q

Paper2: Force & Change in Momentum:

A

Force = Change in momentum / time

30
Q

Paper2: Wave Speed:

A

wave speed = frequency x wavelength or v=fλ

31
Q

Paper2: Period of a Wave:

A

1/frequency

32
Q

Paper2: Refractive Index (Snell’s Law)

A

n = sin i / sin r or the refractive angle = Angle of incidence / angel of refraction

33
Q

Paper2: Magnetic Force on a Current-Carrying Wire (Motor Effect):

A

F=BIL or Force = Magnetic field Strength(Tesla) x Current x Length of the wire

34
Q

Paper2: Transformer Equation:

A

Vp/Vs=Np/Ns
V = Voltage
N = Number of turns
p = primary
s = secondary

35
Q

Paper2: Power in Transformers (If 100% Efficient):

A

VpIp = VsIs
V = Voltage
p = primary
s = secondary

36
Q

Paper2: Orbital Speed:

A

v = 2πr/ T

v = orbital speed (m/s)
T = orbital periods