How this calculator works
Average acceleration compares a velocity change with its elapsed time. A negative result means acceleration points opposite your positive axis, not necessarily that the object slows down. The displacement equations require constant acceleration. The force method uses net force and inertial mass.
Formula
a = (v-u)/t; s = ut + at²/2; v = u+at; F = ma.
Worked example
Changing velocity from 2 to 12 m/s in 5 s gives 2 m/s². Travelling 30 m in 5 s from 2 m/s at constant acceleration gives 1.6 m/s².
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Frequently asked questions
Can acceleration be negative?
Yes. Choose a positive direction and keep all signed quantities consistent.
Can I enter kilometres per hour?
Yes. The velocity selectors convert your values to metres per second before calculation.
Is the distance method valid for varying acceleration?
It returns a constant-acceleration model, which need not describe a varying trajectory.