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一切物体都有惯性,惯性是物体的固有性质,它使物体保持原有的运动状态或静止状态不变。当我们建立惯性的概念时一般会做如图1所示的演
All objects have inertia. Inertia is the inherent nature of an object. It keeps the object in its original state of motion or its state of rest. When we establish the concept of inertia, we usually do the exercises shown in Figure 1.