论文部分内容阅读
题目:有一位消防队员在执行某次任务时,从5m高的平台直立跳下,落地时身体下蹲0.5m站稳,问落地时地面对人的的作用力是人体重的多少倍?这是一道典型的动力学题,解法不唯一,下面列举三种方法。方法一:用牛顿运动定律和运动学公式分析:整个过程看做先做匀加速直线运动再做匀减速直线运动。
Title: A firefighter jumped up and down from a 5-meter-high platform while performing a mission. The body squat down to a height of 0.5m and stood firm when landing. How many times the body-facing force when landing on the ground? This is a typical dynamic problem, the solution is not the only, here are three ways. Method one: using Newton’s law of motion and kinematics analysis: the whole process to do first uniform acceleration linear motion and then do uniform deceleration linear motion.