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中学生对地面的压强是多少
更新时间: 2021-06-19 18:10:32  

1、中学生质量估计为50kg ,人站立时受力面积两只脚S=2×0.02 m2=0.04m2

2、水平地面上,人对地面的压力=人的重力

(1)F=G=mg=50kg×10 N/kg =500N

(2)人对地面的压强P=F/S=500N/0.04m2=1. 25×104 pa

关键词: 中学生 面的 压强 多少

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