Kinetic energy: ½mv²
Change the mass and speed of a moving object and see its kinetic energy on a curve that grows with the square of speed.
Works in metric or imperial units.
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Questions students ask
Why are crashes at high speed so dangerous?
Kinetic energy goes up with the square of speed, so a car at 100 km/h carries four times the energy it has at 50 km/h, and needs four times the distance to brake.
What formula does it use?
Eₖ = ½mv², in joules (mass in kg, speed in m/s).
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