Question

Спортс­мен мас­сой 65 кг стоит на лыжах на за­сне­жен­ной го­ри­зон­таль­ной по­верх­но­сти. Длина каж­дой лыжи 1.8 м, ши­ри­на 10 см. Какое дав­ле­ние ока­зы­ва­ет лыж­ник на снег?

Answer 1

1.8×10=18
P=Sm
P=18×65=

Answer 2

Calculation of Pressure

To calculate the pressure exerted by the skier on the snow, we need to use the formula:

Pressure = Force / Area

The force exerted by the skier can be calculated using the formula:

Force = Mass x Acceleration

In this case, the mass of the skier is given as 65 kg. Since the skier is standing still on a horizontal surface, the acceleration is zero. Therefore, the force exerted by the skier is also zero.

Now, let's calculate the area of each ski. The length of each ski is given as 1.8 m, and the width is given as 10 cm (which is equal to 0.1 m).

The area of each ski can be calculated using the formula:

Area = Length x Width

For each ski, the area is:

Area = 1.8 m x 0.1 m = 0.18 m²

Since the skier is standing on two skis, the total area is:

Total Area = 2 x 0.18 m² = 0.36 m²

Now, we can calculate the pressure exerted by the skier on the snow using the formula:

Pressure = Force / Area

Since the force is zero, the pressure exerted by the skier on the snow is also zero.

Therefore, the skier does not exert any pressure on the snow.