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總重量20+10=30kgw
三個桌腳接觸地面 所以面積=3*20=60cm^2
P=F/A=30/60=0.5kgw/cm^2=500gw/cm^2
Science
Junior High
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求解，謝謝🙏
質地均勻的三腳茶几桌重20kgW,桌上放一重量為10kgW的陶瓷花瓶,每一桌腳
的底面積為20cm²。請問每一桌腳加在地面上的壓力為若干?
(A)0.5 (B)1.5 (C)500 (D)1500gw/cm²。【C】
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