# Physics Equations

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Average speed
Average speed = distance moved/time taken
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Acceleration
Acceleration = change in velocity/time taken
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Force
Force = mass x acceleration
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Weight
Weight = mass x grams
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Momentum
Momentum = mass x velocity
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Force
Force = change in momentum/time taken
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Moment
Moment = force x perpendicular distance from the pivot
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Orbital speed
Orbital = (2 x π x orbital radius)/time period
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Power
Power = current x voltage
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Energy transferred
Energy transferred = current x voltage x time
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Voltage
Voltage = current x resistance
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Charge
Charge = current x time
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Wave speed
Wave speed = frequency x wavelength
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Frequency
Frequency = 1/time period
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Refractive index
n = sin i/sin r
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Critical angle
sin c = 1/n
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Efficiency
Efficiency = useful energy output/total energy input
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Work done
Work done = force x distance moved
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Gravitational potential energy
Gravitational potential energy = mass x g x height
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Kinetic energy
Kinetic energy = 0/5 x mass x (speed x speed)
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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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Pressure difference
Pressure difference = height x density x g
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## Other cards in this set

### Card 2

Acceleration

#### Back

Acceleration = change in velocity/time taken

Force

Weight

Momentum