# A skier weighing 72kg stands on skis. The length of each ski is 1.8, width 10cm. Determine the pressure

September 14, 2021 | education

| **A skier weighing 72kg stands on skis. The length of each ski is 1.8, width 10cm. Determine the pressure exerted by the skier on the snow.**

m = 72 kg

a = 1.8 m

b = 10 cm = 0.1 m

R -?

Pressure P is the ratio of the force F to the area on which it acts S. P = F / S. The gravity force F = m * g acts on the skier, where g is the acceleration of gravity = 10 m / s2. Let’s find the area on which this skier operates, we will find the area of two skis. The area of contact of the ski with the snow has the shape of a rectangle, so the area of one ski will be a * b and there are 2 such skis. S = 2 * a * b. P = F / S = (m * g) / (2 * a * b). P = 72 kg * 10m / s2 / 2 * 1.8m * 0.1m = 4000 Pa

Answer: P = 4000 Pa

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