Question

Какое давление оказывает лыжник массой 70 кг на снег, если длина каждой лыжи 1,75 м, а ширина 8 см?

Answer 1

P=F/S
F=m*g
S=2*a*l
=>
P=m*g/(2*a*l)

m=70кг
g=10Н/м
l=1,75м
a=8см=0,08м

Р=700/0,28=2500Па

Тут самое главное не забыть, что у лыжника две лыжи и перевести все значения в СИ.

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Answer 2

Calculating Pressure Exerted by Skier on Snow

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

Pressure = Force / Area

Where: - Force is the weight of the skier, and - Area is the area of contact between the skis and the snow.

Weight of the Skier

The weight of the skier is given as 70 kg.

Area of Contact

The area of contact between the skis and the snow can be calculated using the length and width of the skis.

The length of each ski is 1.75 m and the width is 8 cm, which can be converted to meters for consistency.

1. Convert the width from centimeters to meters: - 8 cm = 0.08 m

2. Calculate the area of contact for both skis: - Area = Length * Width - Area = 1.75 m * 0.08 m = 0.14 m² (for one ski)

Since there are two skis, the total area of contact is: - Total Area = 2 * 0.14 m² = 0.28 m²

Calculating Pressure

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

Pressure = Weight / Area

Substitute the values: - Weight = 70 kg - Area = 0.28 m²

Pressure = 70 kg / 0.28 m²

The pressure exerted by the skier on the snow is approximately 250 kPa.