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把一物块轻放到水平匀速运动的传送带上,物体开始在滑动摩擦力的作用下匀加速滑动,当物块的速度等于水平传送带的速度时,物块与传送带之间的摩擦力消失.这是一个大家都很熟悉的物理情景.有同学因此而形成思维
Put a block lightly onto a conveyor belt that moves horizontally and evenly. The object starts to slide uniformly under the effect of sliding friction. When the speed of the block equals the speed of the horizontal conveyor belt, the friction between the block and the conveyor belt disappears. This is a physics scene that everyone is familiar with.