S= 10 см^2=0.001 м^2
р=mg/4S ( у стола 4 ножки )
р= 176.4/(4×0.001)= 44100Па = 44.1кПа
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S= 10 см^2=0.001 м^2
р=mg/4S ( у стола 4 ножки )
р= 176.4/(4×0.001)= 44100Па = 44.1кПа