Question

Мальчик кинул мячь с окна со скоростью 10м\с. Мячь упал на растоянии 4,9м. С какой высоты мальчик кинул мячь?

Answer 1

Записываем уравнения по горизонтальной и вертикальной оси:
l = Vot
h = gt^2 / 2
Решаем:

Vot = 10t = 4,9

t = 0,49

h = 9,8 * 0,49^2 / 2 = 1,176 м. 

Answer 2

Calculation of the Height

To determine the height from which the boy threw the ball, we can use the equation of motion for vertical motion:

h = (v^2) / (2g)

Where: - h is the height from which the ball was thrown - v is the initial velocity of the ball (10 m/s) - g is the acceleration due to gravity (approximately 9.8 m/s^2)

Substituting the given values into the equation, we can calculate the height:

h = (10^2) / (2 * 9.8) = 5.102 m

Therefore, the boy threw the ball from a height of approximately 5.102 meters.