平抛运动,怎么做,求解啊!
1个回答
2014-03-05
展开全部
若在第一段:d=0.25m,v0=2m/s,t=0.125s,h=0.5*10*0.125^2=0.078125m,不对
若在第二段:s=0.5m,v0=2m/s,t=0.25s,h=0.5*10*0.25^2=0.3125m,不对
若在第三段:s=0.75m,v0=2m/s,t=0.375s,h=0.5*10*0.375^2=0.703125m>0.6m
所以在第三段
若在第二段:s=0.5m,v0=2m/s,t=0.25s,h=0.5*10*0.25^2=0.3125m,不对
若在第三段:s=0.75m,v0=2m/s,t=0.375s,h=0.5*10*0.375^2=0.703125m>0.6m
所以在第三段
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