Question

РЕБЯТА!!!ПОМОГИТЕ МНЕ!Помогите,пожалуйста.завтраПомогите,пожалуйста.завтра контрольная.помогите решить задачки: хотяб помогите чем сможите!:) 1)Выразите в паскалях давление равные 100Н/м2 и 1,5 кПа2)Мальчика весом 400 Н везут на санках,площадь повозьев которых 0,06 м2.Какое давление они оказывают на снег?Вес самих санок 20 Н.3)Определите давление,оказываемое на пол шкафом , вес которого 800 Н , а площадь поверхности одной его ножки 25 см2.4)Вычеслите давление,которое производит автомобильмассой 1,5 т на почву.Площадь соприкосновения с ней одного колеса машины 150 см2УМОЛЯЮ ВАС!!!

Answer 1

1) 100 Па ,  1500 Па
2) F= 400+20= 420 H    p= F/ S= 420/ 0,06=7000 Па
3)  S= 4 * 25= 100см^2= 0,01 м^2
p= F / S= 800 / 0,01= 80000 Па
4) F=mg    F= 1500 кг*10 н/кг = 15000 Н
S= 4*150= 600см^2= 0,06 м^2
p= F/ S = 15000 / 0,06=250 000 Па

Answer 2

I'd be happy to help you with your questions! Let's go through each problem step by step:

Problem 1: Expressing Pressure in Pascal

To express a pressure of 100 N/m^2 in pascals, we can use the conversion factor that 1 N/m^2 is equal to 1 Pascal (Pa). Therefore, the pressure of 100 N/m^2 is equal to 100 Pa.

Problem 2: Pressure Exerted by the Sled

To calculate the pressure exerted by the sled on the snow, we need to divide the force exerted by the sled by the area of the sled in contact with the snow.

Given: - Weight of the boy = 400 N - Weight of the sled = 20 N - Area of the sled in contact with the snow = 0.06 m^2

To find the total force exerted by the sled, we add the weight of the boy and the weight of the sled: 400 N + 20 N = 420 N.

Now, we can calculate the pressure using the formula: pressure = force / area.

Substituting the values: pressure = 420 N / 0.06 m^2 = 7000 N/m^2.

Therefore, the sled exerts a pressure of 7000 N/m^2 on the snow.

Problem 3: Pressure Exerted by a Cabinet on the Floor

To determine the pressure exerted by the cabinet on the floor, we need to divide the weight of the cabinet by the area of one of its legs in contact with the floor.

Given: - Weight of the cabinet = 800 N - Area of one leg = 25 cm^2 = 0.0025 m^2

Using the formula: pressure = force / area, we can calculate the pressure.

Substituting the values: pressure = 800 N / 0.0025 m^2 = 320,000 N/m^2.

Therefore, the cabinet exerts a pressure of 320,000 N/m^2 on the floor.

Problem 4: Pressure Exerted by a Car on the Ground

To calculate the pressure exerted by the car on the ground, we need to divide the weight of the car by the area of one of its wheels in contact with the ground.

Given: - Mass of the car = 1.5 tons = 1500 kg - Area of one wheel = 150 cm^2 = 0.015 m^2

First, we need to convert the mass of the car from tons to kilograms: 1.5 tons = 1500 kg.

Using the formula: pressure = force / area, we can calculate the pressure.

The force exerted by the car is equal to its weight, which can be calculated using the formula: weight = mass * acceleration due to gravity.

Substituting the values: weight = 1500 kg * 9.8 m/s^2 = 14,700 N.

Now, we can calculate the pressure: pressure = 14,700 N / 0.015 m^2 = 980,000 N/m^2.

Therefore, the car exerts a pressure of 980,000 N/m^2 on the ground.

I hope this helps! Let me know if you have any further questions.