Question

7. Модель тривісного (три осі, на кожній пара коліс) електровозу має масу 15 кг. Площа дотику кожного колеса складає 0, 00005M ^ 2 . Який тиск чинить модель електровоза на рейки? (3 бали)​

Answer 1

Ответ:

P = 500 000 Па

Примечание:

По условию на 1 оси 2 колеса, а так как осей 3, то всего колес 2 * 3 = 6 колес

Объяснение:

Дано:

m = 15 кг

S = 0,00005 м²

g = 10 м/c²

N = 6

Найти:

P - ?

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Решение:

$F = mg$

$S_{6} = NS$

$P = \dfrac{F}{S} = \dfrac{mg}{S_{6}} = \dfrac{mg}{NS}$

$P =$ (15 кг * 10 м/c²) / (6 * 0,00005 м²) = 500 000 Па = 500 кПа

Ответ: P = 500 000 Па.

Answer 2

To calculate the pressure exerted by the model electric locomotive on the rails, we can use the formula:

Pressure = Force / Area

In this case, the force is the weight of the locomotive, and the area is the contact area of each wheel.

Given: - Mass of the model electric locomotive = 15 kg - Area of contact for each wheel = 0.00005 m^2

To find the force, we can use the formula:

Force = Mass * Acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s^2.

Let's calculate the force first:

Force = 15 kg * 9.8 m/s^2

Using a calculator, we find that the force is approximately 147 N.

Now, let's calculate the pressure:

Pressure = Force / Area

Pressure = 147 N / (2 * 0.00005 m^2)

Using a calculator, we find that the pressure exerted by the model electric locomotive on the rails is approximately 1,470,000 Pa (Pascals).

Please note that this calculation assumes that the weight of the locomotive is evenly distributed across all wheels and that the contact area is the same for each wheel.