friction law

例句：

1. 1. The friction law states that the force required to move an object is proportional to its mass and inversely proportional to its velocity.
   摩擦定律指出，移动物体所需的力与物体的质量成正比，与速度成反比。
2. 2. In this case, the friction law applies because the materials are moving against each other at high speeds.
   在这种情况下，摩擦定律适用，因为材料以高速相互摩擦。
3. 3. The friction law is crucial for understanding how materials interact when they comeinto contact with each other.
   摩擦定律对于理解材料在接触时如何相互作用至关重要。