说明：  利用MATLAB强大的科学计算功能和绘图能力，对小球在弹簧顶端木块上的弹性跳动进行计算机仿真，在不计空气阻力和要计空气阻力两种情况下的分析，通过拉格朗日方程求解运动微分方程，再通过MATLAB编程，调试，运行，准确的描绘小球跳动效果图。在物理教学中适当引入相似的计算机数值模拟仿真的研究方法。
(Using the powerful scientific calculation function and drawing ability of MATLAB, this paper simulates the elastic jump of the ball on the wood block at the top of the spring by computer. It analyses the elastic jump of the ball in two cases, including air resistance and required air resistance, solves the differential equation of motion by Lagrange equation, and then programms, debugs and runs accurately by MATLAB. Describe the bouncing effect of the ball. Similar methods of computer numerical simulation are appropriately introduced in physics teaching.)