All Equations Flashcards

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1
Q

Constant motion

A

D = st

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2
Q

Acceleration with velocity and time

A

A = v-u/t

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3
Q

Weight and mass

A

W = mg

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4
Q

Density - kg/m^3

A

ρ = m/v

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5
Q

Force with acceleration

A

F = ma

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6
Q

Terminal velocity

A

W = air resistance

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7
Q

Hooke’s law

A

F = kx
K = spring constant/N/m
X = extension/m

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8
Q

Moment of a force- Nm

A

τ = Fd

F = perpendicular force

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9
Q

Principle of moments

A

F1 x d1 = f2 x d2

Total clockwise moments = total anti-clockwise moments

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10
Q

Mechanical work done - change in energy/J

A

ΔE = fd

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11
Q

Kinetic energy

A

1/2 x m x v^2

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12
Q

GPE/J

A

E = mgh

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13
Q

Power with work done

A

P = ΔE/t

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14
Q

Pressure with area/Pa

A

P = F/A

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15
Q

Pressure due to liquid

A

p = ρhg

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16
Q

Boyles law- pressure and volume relationship

A

pV = constant
p1 x V1 = p2 x V2

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17
Q

Specific heat capacity/J/kg degrees c

A

c = E/mΔt

18
Q

Thermal capacity/ J/degrees c

A

thermal capacity = m x c
Thermal capacity = E/Δt

Q = total heat

19
Q

Specific latent heat/J/kg

A

L = E/m

E = total energy
M = mass change

20
Q

Current with charge

A

I = Q/t

21
Q

Ohms law

A

V = IR
V directly property to I

R = resistance/ohms(Ω)

22
Q

Voltage with charge

A

V = E/Q

E = energy
Q = charge/coulombs

23
Q

Current in series

A

The same everywhere

24
Q

Voltage in series

A

V1 = V2+V3

V1 = emf

25
Q

Power with voltage and current

A

P = IV

26
Q

Power with resistance and voltage

A

P = v^2/R

27
Q

Power with current and resistance

A

P = I^2 x R

28
Q

Energy with power and time

A

E = pt
E = IVT

29
Q

Momentum

A

P = mv

P = momentum
Mv = mass x volume

30
Q

Force with change in impulse

A

F =Δp/t

P = momentum

31
Q

impulse(change of momentum) / kgm/s

A

ΔP = FΔt

32
Q

Conservation of momentum

A

M1xV1 = M2xV2

Total momentum - add when going same direction
- minus when opposite direction

33
Q

Wave speed with wavelength

A

V = fλ
f = frequency
λ= wavelength

34
Q

Frequency with time

A

F = 1/t

35
Q

Refractive index with speeds of light

A

n = c/v

c = speed of light (vacuum)
v = speed of light (medium measured)

36
Q

Refractive index with critical angle

A

n = 1/c angle

37
Q

Refractive index with angle of incidence

A

n = sin(i)/sin(r)

i is always the bigger angle

38
Q

Left hand rule

A

Motor effect

Thumb - force
First finger - field
Second finger - current

39
Q

Right hand rule

A

Generator effect

40
Q

Power in a transformer

A

IV = IV

41
Q

Voltage and turns in a transformer

A

Vp/Vs = Np/Ns

42
Q

Impulse with mass

A

M(v-u)