Question

Цеглина масою 5кг має потенціальну енергію 20Дж .На якій висоті над підлогою розташована цеглина ,якщо за нульовий рівень узято поверхню підлоги?

Answer 1

Ответ:

0,4 м , ещё прикрепляю разбор задачи

Answer 2

Calculating the Height of the Brick

To calculate the height at which the brick is located, we can use the potential energy formula:

Potential energy (PE) = mass (m) * gravitational acceleration (g) * height (h)

Given: - Mass (m) = 5 kg - Potential energy (PE) = 20 J - Gravitational acceleration (g) = 9.81 m/s^2 (standard value on the surface of the Earth)

We can rearrange the formula to solve for height (h):

Height (h) = Potential energy (PE) / (mass (m) * gravitational acceleration (g))

Calculation

Substituting the given values into the formula:

Height (h) = 20 J / (5 kg * 9.81 m/s^2)

Calculating the height:

Height (h) ≈ 20 J / 49.05 ≈ 0.408 meters

So, the brick is located approximately 0.408 meters above the floor, assuming the floor is taken as the reference level (zero height).