# Physics Formulae

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Which equation links average speed, distance travelled and time taken?
Average Speed = Distance Travelled / Time Taken
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Which equation links acceleration, change in velocity and time taken?
Acceleration = Change in Velocity / Time Taken
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Which equation lines force, mass and acceleration?
Force = Mass x Acceleration
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Which equation links weight, mass and gravitational field strength?
Weight = Mass x Gravitational field strength
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Which equation links momentum, mass and velocity?
Momentum = Mass x Velocity
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Which equation links moment, force and perpendicular distance from pivot?
Moment = Force x Perpendicular Distance From Pivot
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Which equation links power, current and voltage?
Power = Current x Voltage
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Which equation links energy, power and time?
Energy = Power x Time
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Which equation links current, charge and time?
Current = Charge / Time
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Which equation links voltage, current and resistance?
Voltage = Current x Resistance
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Which equation links wave-speed, frequency and wavelength?
Wave-speed = frequency x wavelength
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How do you calculate refractive index?
Refractive index = sin i / sin r OR 1 / sin c
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How do you calculate efficiency?
Efficiency = useful energy output from the system / total energy input to the system
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Which equation links work, force and distance?
Work = Force x Distance
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Which equation links gravitational potential energy (GPE), mass, height and gravitational field strength?
Gravitational Potential Energy = Mass x Gravitational Field Strength x Height
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How do you calculate kinetic energy?
Kinetic Energy = 0.5 x mass x velocity squared
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Which equation links power, work done and time taken?
Power = Work Done / Time Taken
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Which equation links density, mass and volume?
Density = Mass / Volume
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Which equation links pressure, mass and volume?
Pressure = Force / Area
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How do you calculate pressure difference?
Pressure Difference = height x density x gravitaional field strength
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## Other cards in this set

### Card 2

#### Front

Which equation links acceleration, change in velocity and time taken?

#### Back

Acceleration = Change in Velocity / Time Taken

### Card 3

#### Front

Which equation lines force, mass and acceleration?

### Card 4

#### Front

Which equation links weight, mass and gravitational field strength?

### Card 5

#### Front

Which equation links momentum, mass and velocity?