Work-Energy Theorem Calculator
Work done and kinetic energy change.
Enter your values
Enter the force in N.
Enter the distance in m.
Enter the angle to motion in degrees.
Enter the mass in kg.
Enter the initial speed in m/s.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Work done
- 1500 J
- Final kinetic energy
- 1500 J
- Final speed
- 12.25 m/s
- Initial kinetic energy
- 0 J
Quick answer
Work W = F x d x cos(theta), which equals the change in kinetic energy.
W = F d cos(theta) = deltaKE
At a glance
| What it does | Work done and kinetic energy change. |
|---|---|
| Category | Physics |
| Inputs needed | Force, Distance, Angle to motion, Mass, Initial speed |
| Main output | Work done |
| Formula | W = F d cos(theta) = deltaKE |
| Cost | Free — no sign-up, no download |
How to use the Work-Energy Theorem Calculator
- 1Enter the applied force, distance and angle between force and travel direction.
- 2Enter mass and initial speed to see the resulting final speed.
- 3The work done equals the change in kinetic energy.
Inputs explained
- Force(N)
- Enter the force in N.
- Distance(m)
- Enter the distance in m.
- Angle to motion(degrees)
- Enter the angle to motion in degrees.
- Mass(kg)
- Enter the mass in kg.
- Initial speed(m/s)
- Enter the initial speed in m/s.
Worked example
Using the values the calculator loads with:
Inputs
- Force150 N
- Distance10 m
- Angle to motion0 degrees
- Mass20 kg
- Initial speed0 m/s
Results
- Work done1500 J
- Final kinetic energy1500 J
- Final speed12.25 m/s
- Initial kinetic energy0 J
Frequently asked questions
What if the angle is 90 degrees?
A force perpendicular to motion does zero work, like gravity on a satellite in circular orbit.
Does this include friction?
Enter friction as a separate negative-work force if needed; this tool assumes one net force.
What do I need to enter into the Work-Energy Theorem Calculator?
Just 5 values: force, distance, angle to motion, mass, initial speed. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Work-Energy Theorem Calculator work out the answer?
Work W = F x d x cos(theta), which equals the change in kinetic energy. It applies the formula W = F d cos(theta) = deltaKE and shows the working so you can check each step by hand.
Is the Work-Energy Theorem Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.