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中學生對地面的壓強是多少
中學生對地面的壓強是多少
更新时间:2026-10-30 04:11:04

  1、中學生質量估計為50kg ,人站立時受力面積兩隻腳S=2×0.02 m2=0.04m2

  2、水平地面上,人對地面的壓力=人的重力

  (1)F=G=mg=50kg×10 N/kg =500N

  (2)人對地面的壓強P=F/S=500N/0.04m2=1. 25×104 pa

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