根据动量守恒定律和机械能守恒定律深入探讨了物块碰撞次数问题.特别是当物块质量的比值是100 的非负整数次方时，碰撞次数刚好和圆周率的前几位数字相同.利用速度相图将碰撞过程直观地描述出来，并结合理论推导解释了上述有趣的结果.

Based on the conservation law of momentum and the conservation law of mechanical energy，the problem about the collision times between blocks is discussed in depth. Particularly，when the ratio of the mass between two blocks is nonnegative integer power of 100，collision times are just the same as the first few digits of circular constant. The velocity phase diagram is used to describe the collision process intuitively，and then the above

interesting result is explained by combining theoretical derivation.