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提出问题:以相同速度行驶的小汽车和大货车,在发生交通事故时,大货车产生的破坏要远大于小汽车产生的破坏:同样的两辆小汽车以不同的速度行驶时,在发生交通事故时,速度大的小汽车产生的破坏要大于速度小的小汽车产生的破坏.我们知道,物体由于运动而具有的能叫动能.那么,物体的动能跟哪些因素有关?猜想与假设:猜想1:物体的动能大小与物体的质量有关.猜想2:物体的动能大小与物体的运动速度有关.实验方法:1.由于物体的动能可能与物体的质量和速度都有关,探究时应采用控制变量法.即先控制两物体的速度相同,探究物体的动能大小与物体质量的关系;然后再控制物体的质量相同,探究物体的动能大小与物体速度的关系.2.由于物体动能的大小无法直接观察到,我们可
Ask a question: Cars and vans that travel at the same speed will have far more damage than large cars in the event of an accident: when the same two cars are traveling at different speeds, when traffic occurs In an accident, a car with a higher speed produces more damage than a car with a lower speed. We know that the object has kinetic energy due to its movement. So, what are the kinetic energy of the object? Conjecture and Assumption: Conjecture 1: the kinetic energy of the object size and the quality of the object.Conject 2: the kinetic energy of the object size and the velocity of the object.Experimental methods: 1.As the kinetic energy of the object may be related to the quality and speed of the object, the inquiry should be used to control The variable method is to control the velocity of the two objects the same at the same time to explore the relationship between the kinetic energy of the object and the mass of the object.And then control the mass of the object the same and explore the relationship between the kinetic energy of the object and the velocity of the object.2.Due to the size of the object’s kinetic energy Directly observed, we can