Question

Мешок с песком оторвался от воздушного шара и через 4 с упал на землю. На какой высоте находился воздушный шар? Сопротивлением воздуха пренебречь.

Answer 1

Формула высоты при свободном падении
h= 5*t^2
h=5*16=80м
Ответ 80 м

Answer 2

Calculating the Height of the Hot Air Balloon

To calculate the height at which the hot air balloon was when the sandbag detached and fell to the ground, we can use the formula for the distance fallen under gravity. The formula is given by:

s = ut + (1/2)gt^2

Where: - s = distance fallen (in this case, the height from which the sandbag fell) - u = initial velocity (in this case, the velocity of the sandbag when it detached, which is 0 m/s as it was momentarily at rest) - t = time taken (in this case, 4 seconds) - g = acceleration due to gravity (approximately 9.81 m/s^2)

Calculation

Using the given time (t = 4 seconds) and assuming the acceleration due to gravity (g = 9.81 m/s^2), we can calculate the height at which the hot air balloon was when the sandbag detached and fell to the ground.

s = ut + (1/2)gt^2 s = 0*4 + (1/2)*9.81*4^2 s = 0 + 0.5*9.81*16 s = 0 + 78.48 s = 78.48 meters

Answer

The hot air balloon was at a height of 78.48 meters when the sandbag detached and fell to the ground.