How to use the work-energy theorem calculator
Find final speed after a net force does work on an object. Enter mass, initial speed, net work done in the fields above; the final speed, change in kinetic energy are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- m — Mass (kg)
- v0 — Initial speed (m/s)
- W — Net work done (J)
Worked example
With mass = 10 kg, initial speed = 2 m/s, net work done = 500 J, the calculator gives final speed ≈ 10.19804 m/s; change in kinetic energy ≈ 500 J.
Frequently asked questions
What is the formula for the work-energy theorem calculation?
Final speed (m/s) = √(v0 × v0+2 × W / m). Change in kinetic energy (J) = W. Here m is mass (kg), v0 is initial speed (m/s), W is net work done (J).
What inputs do I need for the work-energy theorem calculator?
You need mass in kg, initial speed in m/s, net work done in J. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.