Question

4. Лыжник оказывает на снег давление равное 1575 Па. Определите силу давления лыжника на снег, если длина каждой лыжи 1,8 м, а ширина 10 см?

Answer 1

Ответ:

567

Объяснение:

P = 1575 Па.

a = 1,8 м.

b = 10 см = 0,10 м.

F - ?

Р = F / S, где F - сила, которая действует, S - площадь приложения силы.

F = Р * S.

Плоскость соприкосновения лыжи со снегом имеет форму прямоугольника, то площадь одной лыжи будет a*b.

Так как лыжи две, то S = 2*a*b.

F = Р * 2*a*b.

F = 1575 Па *2 *1,8м*0,10м = 900 Н.

Ответ: F = 567 Н.

Answer 2

Calculation of Pressure:

To determine the force of pressure exerted by the skier on the snow, we need to calculate the pressure first. Pressure is defined as the force applied per unit area. The formula for pressure is:

Pressure = Force / Area

In this case, the force is the weight of the skier and the area is the contact area between the skis and the snow.

Calculation of Force:

The force can be calculated using the formula:

Force = Mass x Acceleration due to gravity

The mass of the skier is not given in the question, so we cannot calculate the force directly. However, we can use the given pressure and the dimensions of the skis to calculate the force indirectly.

Calculation of Area:

The area can be calculated using the formula:

Area = Length x Width

Given that the length of each ski is 1.8 m and the width is 10 cm (which is equal to 0.1 m), we can calculate the area as follows:

Area = 1.8 m x 0.1 m = 0.18 m²

Calculation of Force of Pressure:

Now, we can substitute the values into the formula for pressure to calculate the force of pressure exerted by the skier on the snow:

Pressure = 1575 Pa

Area = 0.18 m²

Force = Pressure x Area

Force = 1575 Pa x 0.18 m²

Calculating this, we find:

Force = 283.5 N

Therefore, the force of pressure exerted by the skier on the snow is 283.5 Newtons.