≈ 18182 Па при ходьбе
≈ 9091 Па стоя на месте
Объяснение:
Количество полных клеток: 822.
Количество неполных клеток: 122.
Тогда площадь опоры ботинка:
(822 + (122 : 2)) · 1/4 см² = (822 + 61) · 1/4 см² = 883 · 1/4 см² = 220,75 см².
Дано:
S1 = 220,75 см² ≈ 0,022 м²
g ≈ 10 Н/кг
m = 40 кг
p1 - ? (давление при ходьбе)
p2 - ? (давление, стоя на месте)
Так как принято считать, что по ходьбе человек всегда опирается на одну ногу, то:
p1 = F / S1 ; F = mg => p1 = mg / S1
p1 = (40 кг · 10 Н/кг) / 0,022 м² ≈ 18182 Па
Так как стоя на месте человек опирается на две ноги, то:
p2 = F / (S1 · 2) ; F = mg => p2 = mg / (S1 · 2)
p2 = (40 кг · 10 Н/кг) / (0,022 м² · 2) ≈ 9091 Па
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