Kinetic Energy of a 70 kg Person Running at 5 m/s
A 70 kg person running at 5 m/s (18 km/h) has a kinetic energy of 875 J.
How to use this tool
- Enter mass and speed in the fields above.
- Results update instantly as you type โ or click Calculate.
- Read your kinetic energy and the full breakdown beneath it.
A jogging person carries nearly 1 kJ of kinetic energy โ all of which must be absorbed in a collision.
Frequently asked questions
- Why does speed have a larger effect than mass?
- Because speed is squared. Doubling mass doubles KE; doubling speed quadruples it.
- How do I convert km/h to m/s?
- Divide by 3.6. For example, 90 km/h = 25 m/s.