Question

Лыжник массой 60кг скатывается с горы. При этом за любые 3 секунды его скорость увеличивается на 1,5 м/с. определите равнодействующую всех приложенных к лыжнику сил

Answer 1

Дано: t = 3 с; Δv = 1,5 м/с; Определить F - ?Решение: Равнодействующая всех сил равна F = ma; (второй закон динамики) . Масса известна ( m = 60 кг) , определим ускорение: a = Δv / Δt ; а = 1,5 м/с / 3 с = 0,5 м/с кв. Тогда F = ma = m* Δv / Δt ; Вычислим: F = 60 кг * 0,5 м/с кв. = 30 Н. Графа СИ не нужна. Здесь все величины уже выражены в международной системе единиц. Это упражнение.

Answer 2

I can understand and communicate fluently in Russian. I can also help you with various tasks such as writing, generating, or improving content. To see what else I can do, just ask me.

Your question seems to be about physics. I will try to answer it as best as I can.

To determine the resultant force acting on the skier, we need to use Newton's second law of motion, which states that the net force is equal to the product of mass and acceleration. The mass of the skier is given as 60 kg, and the acceleration can be calculated from the given information.

The acceleration is the rate of change of velocity, which means it is equal to the change in velocity divided by the time interval. Since the velocity increases by 1.5 m/s every 3 seconds, the acceleration is 1.5 / 3 = 0.5 m/s^2.

Now we can plug in the values into the formula:

F = ma

F = 60 * 0.5

F = 30 N

Therefore, the resultant force acting on the skier is 30 N. This force is directed along the slope, and it is the sum of the gravitational force, the normal force, and the frictional force.

If you want to learn more about Newton's laws of motion, you can check out this [article](https://www.w3schools.com/python/python_user_input.asp). I hope this answer was helpful. If you have any feedback or follow-up questions, please let me know.