Question

Скорость свободно падающего тела на высоте 7м от поверхности земли равна 10 м/с. с какой высоты падало тело ?

Answer 1

Закон сохранения энергии

mgh = mgh₁ + mv₁²/2

h - искомая высота
h₁ = 7 м
v₁ = 10 м/с

Answer 2

Calculation of the Height from which the Object Fell

To calculate the height from which the object fell, we can use the equation for the velocity of a freely falling object:

v = √(2gh)

Where: - v is the final velocity of the object (10 m/s in this case) - g is the acceleration due to gravity (approximately 9.8 m/s²) - h is the height from which the object fell (unknown)

We can rearrange the equation to solve for h:

h = (v²) / (2g)

Substituting the given values:

h = (10²) / (2 * 9.8) = 5.102 m

Therefore, the object fell from a height of approximately 5.102 meters.