kinetic equation

例句：

1. 1. The motion of the ball is described by the kinetic equation.
   球的运动由动力学方程描述。
2. 2. The kinetic energy of a projectile is proportional to its mass and velocity squared.
   投射物的动能与其质量和速度的平方成正比。
3. 3.In physics, the kinetic equation is used to describe the motion of particles in a fluid.
   在物理学中，动力学方程用于描述粒子在流体中的运动。