Physics

Kinetic Energy Calculator

Find the kinetic energy of a moving object.

Mass

Velocity

Calculated Output

Kinetic energy (J) 200,000

Formula: KE = ½ × m × v²

Step-by-Step Breakdown

1. Values used:

2. Mass = 1,000

3. Velocity = 20

5. Kinetic energy = 200,000J

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The math behind it

KE = ½ × mass × velocity². Note velocity is squared, so doubling speed quadruples the energy.

1,000 kg car at 20 m/s → ½ × 1000 × 400 = 200,000 J (200 kJ).

Why does speed matter so much in crashes?

Because energy scales with the square of speed — small speed increases mean much more impact energy.