力是一种相互作用，当没有反对时，会改变对象的运动。它是在纽顿（N）中测量的。
1 ft·lbf = 1 ft·lbf
1 ft·lbf = 1 ft·lbf
例子:
将15 脚击力转换为脚击力：
15 ft·lbf = 15 ft·lbf
| 脚击力 | 脚击力 |
|---|---|
| 0.01 ft·lbf | 0.01 ft·lbf |
| 0.1 ft·lbf | 0.1 ft·lbf |
| 1 ft·lbf | 1 ft·lbf |
| 2 ft·lbf | 2 ft·lbf |
| 3 ft·lbf | 3 ft·lbf |
| 5 ft·lbf | 5 ft·lbf |
| 10 ft·lbf | 10 ft·lbf |
| 20 ft·lbf | 20 ft·lbf |
| 30 ft·lbf | 30 ft·lbf |
| 40 ft·lbf | 40 ft·lbf |
| 50 ft·lbf | 50 ft·lbf |
| 60 ft·lbf | 60 ft·lbf |
| 70 ft·lbf | 70 ft·lbf |
| 80 ft·lbf | 80 ft·lbf |
| 90 ft·lbf | 90 ft·lbf |
| 100 ft·lbf | 100 ft·lbf |
| 250 ft·lbf | 250 ft·lbf |
| 500 ft·lbf | 500 ft·lbf |
| 750 ft·lbf | 750 ft·lbf |
| 1000 ft·lbf | 1,000 ft·lbf |
| 10000 ft·lbf | 10,000 ft·lbf |
| 100000 ft·lbf | 100,000 ft·lbf |
规则