【摘要】 应用牛顿第二定律,分析了自由落体的冲击问题,不仅可以得到与能量法相同的结果,同时还能求出在冲击过程中冲击物的加速度的变化规律和冲击所持续的时间,并对用能量法导出的计算公式进行了修正和完善。更多还原

【Abstract】 Based on Newton’s second law, the impact problem of a free falling body is analyzed. The result the same as that by the energy method,and the variation of acceleration during the impact process and the impact time are derived as well. The related formula of the energy method are modified and improved.更多还原