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为了做出性能好的无动力小车,老师带领我们开展了研究性学习,采用了实验加推理的研究方法。最初,我们是用拆除电动机的四驱车作试验。我们用拆去电动机和加上砝码的方法来改变车的质量,得出的结论是:小车质量增加1倍,小车运动距离的增加却小于1倍。由于运动成绩=运动距离(米)/
In order to make a non-powered car with good performance, the teacher led us to carry out research studies and adopted experimental and reasoning research methods. Initially, we used a four-wheel drive vehicle to remove the motor for testing. We used the method of removing the motor and adding weights to change the quality of the car. We concluded that the quality of the car has increased by a factor of two and the increase in the movement distance of the car has been less than one time. Due to athletic performance = movement distance (m)/