An athlete weighing 78 kg stands on skis. Each ski is 1.95 m long and 8 cm wide. What pressure does the athlete put on the snow?
| January 9, 2021 | education
P = F / S, F = m * g, m – mass (m = 78 kg), g = 10 m / s², S – total area of skis (S = 2 * a * b, а – length (а = 1 , 95 m), b – width (b = 0.08 m)). P = m * g / (2 * a * b) = 78 * 10 / (2 * 1.95 * 0.08) = 2500 Pa = 2.5 kPa.
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