这个实验专注于运动物体的运动学特性，而忽略作用于它们的力。

The experiment focuses on the ___kinematic properties of the moving objects, ignoring the forces acting on them.

机械工程师需要理解运动学原理来设计机器人的移动部件。

Mechanical engineers need to understand ___kinematic principles to design the moving parts of robots.