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高中物理课本中有这样一段话:“一切物体总保持匀速直线运动的状态或静止状态.直到有外力迫使它改变为止”.这是牛顿第一定律.物体保持匀速直线运动或静止状态.这种性质叫惯性.所以牛顿第一定律又叫惯性定律.质量是物体惯性大小的量度(惯性大小体现在运动状态的改变难易程度上).这些内容是大家都非常熟悉的.解决问题时是否能熟练准确地应用呢?我们看下面的例题.
In high school physics textbooks there is such a statement: “All objects always maintain a state of uniform linear motion or static state. Until there is an external force to force it to change ”. This is Newton’s first law. The object to maintain a uniform linear motion or stationary state. This property is called inertia. So Newton’s first law is also called the law of inertia. Quality is a measure of the size of the inertia of an object (the magnitude of inertia is reflected in how difficult it is to change the state of motion). These are things we all are very familiar with. Can you apply it skillfully and accurately? Let’s look at the following examples.