Calculated result
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Classical energy model
KE = ½mv²; reverse forms are m = 2KE÷v² and v = √(2KE÷m). Inputs normalize to kilograms, meters per second, and joules.
Physics boundary
This classical formula does not model relativistic speeds or establish real-world safety. Zero velocity correctly produces zero kinetic energy; reverse denominators must be positive.
Worked example
The editable example values above demonstrate the formula and expose each conversion or parsing assumption used in the result.