GCSE Physics Equations

Some useful equations to know. You may not need to learn all of them, depending on your exam board, but they're useful for when you're doing practice papers etc.

Features equations for many different situations, including acceleration, efficiency, power and more!

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Physics Equations Sheet
Power = Voltage x Current
(Watts, W) (Volts, V) (Amps, I)
P = V x I
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Voltage = Current x Resistance
(Volts) (Amps) (Ohms)
V = I x
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Charge = Current x time
(Coulombs) (Amps) (Seconds)
Q = I x t
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Energy = Voltage…

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Power = Energy ÷ Time
(Watts) (Joules) (Seconds)
P = E ÷ t
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Speed = Distance ÷ Time
s = d ÷ t
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Acceleration = Change in velocity ÷ time
(m/s) (seconds)
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Resultant force = mass x acceleration
(N) (Kg) (m/s2)
F = m x a…

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Payback Time = cost of installation ÷ savings per year in fuel
costs
(Years) (£) (£)
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Potential difference = current × resistance
(Voltage, V) (Amperes, I) ()

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