All Equations Flashcards

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

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
Power with voltage and current
P = IV
26
Power with resistance and voltage
P = v^2/R
27
Power with current and resistance
P = I^2 x R
28
Energy with power and time
E = pt E = IVT
29
Momentum
P = mv P = momentum Mv = mass x volume
30
Force with change in impulse
F =Δp/t P = momentum
31
impulse(change of momentum) / kgm/s
ΔP = FΔt
32
Conservation of momentum
M1xV1 = M2xV2 Total momentum - add when going same direction - minus when opposite direction
33
Wave speed with wavelength
V = fλ f = frequency λ= wavelength
34
Frequency with time
F = 1/t
35
Refractive index with speeds of light
n = c/v c = speed of light (vacuum) v = speed of light (medium measured)
36
Refractive index with critical angle
n = 1/c angle
37
Refractive index with angle of incidence
n = sin(i)/sin(r) i is always the bigger angle
38
Left hand rule
Motor effect Thumb - force First finger - field Second finger - current
39
Right hand rule
Generator effect
40
Power in a transformer
IV = IV
41
Voltage and turns in a transformer
Vp/Vs = Np/Ns
42
Impulse with mass
M(v-u)