What this calculator does
Work, power & efficiency works out energy transferred, the rate of transfer and what is lost. Enter your own figures above and the answer updates as you type: nothing is fixed in the code, so the result reflects exactly the numbers you supply.
The formula this calculator evaluates is printed under the tool and explained below, so you can check the working by hand or reuse it in a spreadsheet.
The formula
FormulaW = F·d·cosθ; P = W/t; efficiency = useful output / input × 100
The inputs explained
| Field | What to enter |
|---|---|
| Force (N) | A number, measured in N. Starts at 200. |
| Distance (m) | A number, measured in m. Starts at 15. |
| Angle to the direction of motion (°) | A number, measured in °. Starts at 0. |
| Time taken (s) | A number, measured in s. Starts at 10. |
| Efficiency (%) | A number, measured in %. Starts at 85. |
Worked examples
Every figure in the tables below is produced by this page’s own calculator at build time, so the numbers and the tool always agree. Select any row to load that scenario.
How the answer changes with force
Every other input is held at the calculator’s starting values while force varies. Select any row to load that scenario into the calculator.