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力是物体对物体的作用。如推土机推走泥土,人拉车前进,手提箱子向上,人压弹簧变形等都是一物体接触别的物体的作用,是物体之间接触显示出推、拉、提、压等力,一物体施加了力,而别的物体受到了力。那么物体之间不相互接触能显示力吗?试做下面实验来探个究竟。实验器材:塑料直尺(
Force is the effect of an object on an object. If the bulldozer pushes away the dirt, the person pulls the car forward, the suitcase goes upwards, and the deformation of the human pressure spring is the effect of an object touching another object. It is the contact between the objects that shows the force of pushing, pulling, lifting, pressing, etc. Force is applied, and other objects are subjected to force. Can the objects show their strength without touching each other? Try the following experiment to find out. Experimental equipment: plastic ruler (