Question

До какой высоты поднялся после удара футбольный мяч, если он упал на землю через 4с после удара?

Answer 1

Мячик летел всего 4 секунды, значит он летел вверх и вниз равное количество времени, то есть 2 секунды.
h=vot+gt^2/2
Когда летит вверх:
H=2Vo-5*4
Когда летит вниз:
h=5*4=20 метров
Ответ:20 метров

Answer 2

Calculation of the Height Reached by the Football

To calculate the height reached by the football after it fell to the ground 4 seconds after being hit, we can use the equation of motion for free fall:

h = (1/2) * g * t^2

Where: - h is the height reached by the football - g is the acceleration due to gravity (approximately 9.8 m/s^2) - t is the time it takes for the football to fall (4 seconds in this case)

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

h = (1/2) * 9.8 * (4^2)

Simplifying the equation:

h = 0.5 * 9.8 * 16

h = 78.4 meters

Therefore, the football reached a height of approximately 78.4 meters after falling to the ground 4 seconds after being hit.