Question

На какую высоту нужно подбросить мяч массой 0,5 кг чтобы он приобрел потенциальную энергию 25 джоулей относительно поверхности земли

Answer 1

E=mgh.
h=E/mg
Ответ:h=5м

Answer 2

Calculating the Height for Potential Energy

To calculate the height to which a 0.5 kg ball must be raised to acquire a potential energy of 25 joules relative to the surface of the earth, we can use the formula for potential energy:

Potential Energy (PE) = mass (m) * acceleration due to gravity (g) * height (h)

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

h = PE / (m * g)

Substituting the given values: - Potential Energy (PE) = 25 J - Mass (m) = 0.5 kg - Acceleration due to gravity (g) = 9.81 m/s^2 (standard value)

We can calculate the height using the formula:

h = 25 J / (0.5 kg * 9.81 m/s^2)

Calculation

``` h = 25 J / (0.5 kg * 9.81 m/s^2) h ≈ 5.102 m ```

So, the ball must be raised to a height of approximately 5.102 meters to acquire a potential energy of 25 joules relative to the surface of the earth.