Fasten the axis of a wheel to a vertical thread that has a certain torsional resistance. Twist the thread, spin the wheel, and release it. Investigate the dynamics of this system.
先设法去买一个类似的玩具!!! — 乐永康 2017/03/20 07:59
各位同学,网上能找到合适的模型、玩具吗?若没有,可以拿自行车轮改造后做实验! 时间已经蛮紧了,你们要开始做实验了!— 乐永康 2017/03/22 21:58
— 赖耘 2017/03/22 21:50
— 赖耘 2017/03/18 16:54