已知：P（Max）=1000Pa m(人)=50kgm(板)=10kgg＝10N/kg求：S(Min)=?F=G=mg= [m(人)+ m(板)]*g=(50kg+10kg)*10N/kg=600N由P=F/S可得S=F/P所以S(Min)=F/P（Max)=600N/1000Pa=0.6m²