Third Equation of Motion (v² = u² + 2as)

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v² = u² + 2as

What each symbol means

SymbolWhat it stands for
aConstant acceleration (m/s²)
sDisplacement along axis (m)
uInitial speed (m/s)
vFinal speed magnitude along axis (m/s)

When to use this

Constant straight-line acceleration; v and u are components along same axis.