免费机械利益计算器
计算简单机械的机械利益(省力比)。
Mechanical Advantage
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Mechanical Advantage vs Output Force (Load)
公式
## Mechanical Advantage Mechanical advantage describes how much a simple machine multiplies the input force. ### Formula **MA = F_output / F_input** An MA greater than 1 means the machine amplifies force; less than 1 means it amplifies distance/speed instead.
计算示例
A lever lifts a 500 N load with 100 N of effort.
- 01MA = F_output / F_input
- 02MA = 500 / 100
- 03MA = 5
常见问题
Can mechanical advantage be less than 1?
Yes. Some machines trade force for speed or distance. A baseball bat has MA less than 1 but amplifies the speed of the tip.
Does a machine with high MA save energy?
No. By conservation of energy, what is gained in force is lost in distance. Work input equals work output (minus friction losses).
What are examples of simple machines?
Levers, pulleys, inclined planes, wedges, screws, and wheel-and-axle systems are the six classical simple machines.
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