Question

Тело падает с высоты 20 метров начальная скорость равна нулю на какой высоте окажется тело через 2 секунды воздух пренебречь

Answer 1

Вроде так: взяла за ho расстояние , которое тело пройдет за данное время 

Answer 2

S-?
S=h-ho=20-gt^2/2=20-20=0,тело упадёт через 2 сек

Answer 3

Calculation of the Height

To determine the height at which the object will be after 2 seconds, we can use the equations of motion. Given that the initial velocity is zero and the acceleration due to gravity is approximately 9.8 m/s^2, we can calculate the height using the following formula:

h = h0 + v0t + (1/2)gt^2

Where: - h is the final height - h0 is the initial height (20 meters in this case) - v0 is the initial velocity (which is zero) - t is the time (2 seconds) - g is the acceleration due to gravity (approximately 9.8 m/s^2)

Substituting the values into the formula, we can calculate the height:

h = 20 + 0 * 2 + (1/2) * 9.8 * (2^2)

Simplifying the equation:

h = 20 + 0 + (1/2) * 9.8 * 4

h = 20 + 0 + 4.9 * 4

h = 20 + 19.6

h = 39.6 meters

Therefore, the object will be at a height of 39.6 meters after 2 seconds of free fall from an initial height of 20 meters.