kinetic factor

例句：

1. 1. The kinetic energy of the projectile is equal to its mass times the acceleration.
   投射物的动能等于其质量乘以加速度。
2. 2. The kinetic force between two objects is proportional to their distance and inversely proportional to the square of their relative velocity.
   两个物体之间的动量力与它们之间的距离成正比，与相对速度的平方成反比。
3. 3. In a simplified model, the kinetic energy of an object can be represented by its mass and velocity.
   在简化模型中，一个物体的动能可以由其质量和速度来表示。