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【提出问题】细心的小明在书上看到了“城市街道上的最高行驶速度”(如下表):小明提出了下列问题:为什么要对机动车的速度进行限制?为什么在同样的道路上,不同车型的限制车速不一样?【猜想与假设】小明经过分析认为,这一定与物体的动能有关,他猜想:(1)运动物体的速度越大动能也越大;(2)运动物体的质量越大动能也越大。【制定计划与设计实验】为了顺利完成探究,小明做了如下的思考和计划:(1)选小球为运动物体,小球的动
【Ask a Question】 Careful Xiao Ming saw “the maximum speed of a city on the street” (as the table below): Xiao Ming raised the following questions: Why is the speed of a motor vehicle limited? Why is it on the same road , The different models of the speed limit is not the same? [Assumptions and Assumptions] Xiao-Ming analysis that, it must be related to the kinetic energy of objects, he conjecture: (1) moving objects faster kinetic energy greater; (2) The greater the mass, the greater the kinetic energy. Formulation of planning and design experiments In order to successfully complete the inquiry, Xiao Ming made the following considerations and plans: (1) select the ball as a moving object, the movement of the ball