How do you find velocity from kinetic energy and mass?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
Use the kinetic energy formula rearranged:
v = √(2KE/m)
where KE is kinetic energy in joules and m is mass in kilograms.
Quick calculation method:
- Multiply kinetic energy by 2
- Divide by mass
- Take the square root
Example: A 5 kg object with 250 J kinetic energy has velocity = √(2 × 250 / 5) = √100 = 10 m/s.
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