# Physics Equations

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Speed
speed = distance/time
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Acceleration
acceleration = change in velocity/time
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Force
force = mass x acceleration
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Weight
weight = mass x gravitational field strength
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Momentum
momentum = mass x velocity
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Force
force = change in momentum/time
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Momentum
force x time = change in momentum
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Moment
moment = force x perpendicular distance from pivot
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Orbital speed
orbital speed = 2πr/T
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Power
power = current x voltage
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Energy
energy = power x time
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Energy
energy = current x voltage x time
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Current
current in amps = change in coulombs/time
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Voltage
voltage = current x resistance
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Frequency
frequency = 1/period
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Wave Speed
wave speed = frequency x wavlength
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Law of Refraction
refractive index = sin i/sin r
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Refractive Index
refractive index = 1/sin c
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Efficiency
efficiency = useful energy output/total energy output
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Work
work = force x distance
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Gravitational Potential Energy
GPE - mass x gravitational field strength x height
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Weight
weight = mass x gravitational field strength
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Kinetic Energy
KE = 1/2 mass x speed (2)
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Power
power = work done/time taken
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Density
density = mass/volume
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Pressure
pressure = force/area
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## Other cards in this set

### Card 2

#### Front

acceleration = change in velocity/time

Acceleration

### Card 3

#### Front

force = mass x acceleration

### Card 4

#### Front

weight = mass x gravitational field strength

### Card 5

#### Front

momentum = mass x velocity