Question

Хлопчик тягне санчата вгору прикладаючи силу 25H. Якою є маса санчат, якщо висота гірки становить 3м, її довжина 6 м, а ККД 80%?

Answer 1

Решение на фотке)))))

Answer 2

Calculation of the Mass of the Sled

To calculate the mass of the sled being pulled up the hill, we can use the formula for work done, which is:

Work = Force × Distance

In this case, the force applied is 25H and the distance is the length of the hill, which is 6m. The work done is also equal to the change in potential energy, which can be calculated using the formula:

Potential Energy = Mass × Gravity × Height

Given that the efficiency (ККД) is 80%, we can use this information to find the mass of the sled.

Calculation Steps

1. Calculate the work done by the boy pulling the sled up the hill: - Work = Force × Distance - Work = 25H × 6m

2. Calculate the potential energy gained by the sled: - Potential Energy = Work - Potential Energy = 25H × 6m

3. Use the efficiency (ККД) to find the actual potential energy gained: - Actual Potential Energy = Potential Energy × Efficiency - Actual Potential Energy = 25H × 6m × 80%

4. Use the potential energy formula to find the mass of the sled: - Mass = Actual Potential Energy / (Gravity × Height) - Mass = (25H × 6m × 80%) / (Gravity × 3m)

Answer

The mass of the sled can be calculated using the steps above. However, the specific value of "H" and the acceleration due to gravity are not provided in the question, so the exact numerical value of the mass cannot be determined without this information.