Kinetic Energy Calculator
Rearranges the kinetic energy formula.
Answer
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Kinetic energy —
Mass —
Speed —
The formula
KE = ½ m v²
Accurate for ordinary speeds. Close to the speed of light it needs the relativistic form.
What to watch out for
Speed counts twice over, so it dominates. It is why stopping distance grows so quickly with speed.
Frequently Asked Questions
What is the kinetic energy of a 1,500 kg car at 20 m/s?
300 kJ.
What happens if speed doubles?
Energy goes up four times. The same car at 40 m/s has 1,200 kJ.