沿两条不同的路径让两只相同的玻璃球以同样的初速度滚下来,球A从开始到结束一直是沿着略有坡度的直线路径滚下,而球B则是沿着一条起伏不平的路径,从同一起点到同一终点。如果两只球是同时无初速度开始自由滚下,你认为哪一只能够先到达终点?为什么?假设没有摩擦力。 |
这个题目很经典的 |
layout of the route. I could not post the figure here. From the question, only one thing can be determined that the final rate of the two balls are the same. Sorry for the confusion |
欢迎光临 珍珠湾ART (http://art.zhenzhubay.com/) | Powered by Discuz! X3 |