Question

Свежевыпавший снег выдерживает давление до 2 кПа. Чтобы человек массой 80 кг мог стоять на лыжах, общая площадь лыж должна быть не менее 1) 0,06 м2 2) 0,16 м2 3) 0,25 м2 4) 0,4 м2

Answer 1

P=F*S
F=mg=80*10=800H
кПА=10^3 Па
S=F/P=800/200=0.4м

Answer 2

This is a physics question about the pressure exerted by a person standing on skis on fresh snow. The question asks to find the minimum total area of the skis that would allow the person to stand without sinking into the snow. The answer can be found by using the formula for pressure: $$p = \frac{F}{S}$$, where $$p$$ is the pressure, $$F$$ is the force, and $$S$$ is the area. To solve this problem, we need to know the following information:

- The mass of the person is 80 kg. - The pressure of the fresh snow is 2 kPa. - The acceleration due to gravity is 9.8 m/s^2.

We can use these values to find the force exerted by the person on the snow: $$F = mg = 80 \times 9.8 = 784 N$$, where $$m$$ is the mass and $$g$$ is the gravity. Then, we can rearrange the formula for pressure to find the area: $$S = \frac{F}{p} = \frac{784}{2 \times 10^3} = 0.392 m^2$$, where $$p$$ is the pressure. This is the minimum total area of the skis that would allow the person to stand on the snow without sinking. Therefore, the correct answer is 4) 0.4 m^2.

If you want to learn more about the concept of pressure and how it applies to different situations, you can check out some of the web search results that I found for you . I hope this helps you understand the problem better.