在校运会的铅球比赛中,王林同学将铅球向斜上方推出。若铅球质

 在校运会的铅球比赛中,王林同学将铅球向斜上方推出。若铅球质量为4kg,铅球推出时离地面高度为1.6m,推出时铅球速度大小为10m/s。不计空气阻力,以地面为参考平面,则铅球推出时的动能为________J,重力势能为_______J,铅球落地时的动能为______J。(g取10m/s2

 

答案

 200    64     264

 

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