问题补充，请用matlab,帮我编译吧，然后能解释下吗

懂matlab，但真心不懂运动的公式

有人能解决不，在线等
http://zhidao.baidu.com/link?url=M4F9WaFpQqUezolVKpHsSwVsSAg1liT59DWmiO9rTACVcylpdeg3V_1HsfPXCVIJkM2f9fay7hAfyABtS_bZrK&qq-pf-to=pcqq.c2c
这个是百度问答，希望能帮助你帮助我解决

之后可以追加 再给金币的

Essentially that is sort of number theory problem, i.e.
With certain condition between the spring constant and the initial speed, the ball will just cover the same line over and over again on each circle (when 2* \pi * L0 / v happends to be integer time of the period of spring)
However, with other condition, the ball might cover different trace at different circle, thus will cover part of the circle of radius L (could it possibly to be all? maybe not due to some residue theorem from number theory)

It sound like an interesting problem, I will see if I can come up with something we I got some spare time. Sorry, can not type Chinese in office