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在高中物理力学实验教学中,我们都很熟悉这样一套实验装置(如图1),它在“探究小车速度随时间的变化规律”“探究加速度与力、质量的关系”“探究功与速度变化的关系”“验证机械能守恒定律”等实验中都有重要应用。虽然是同一套实验装置,但是各实验对实验器材的选择和要求却略有差别,差别性主要体现在以下两个方面:①实验前是否需要平衡摩擦力;②在选取实验器材时,是否要求小车的质量M远远
In high school physical mechanics experimental teaching, we are all familiar with such a set of experimental devices (Figure 1), which “in the study of the speed of the car with the law of time ” “to explore the relationship between acceleration and force, quality ”Explore the relationship between power and speed changes “ ”Verify the law of conservation of mechanical energy " and other experiments have important applications. Although the same experimental device, but the experiment on the choice of experimental equipment and requirements are slightly different, the difference is mainly reflected in the following two aspects: ① whether the need to balance the friction before the experiment; ② in the selection of experimental equipment, whether the requirements The quality of the car M far