Question

Тело упало с некоторой высоты с нулевой начальной скоростью и при ударе о землю имело скорость 40 м/с. Чему равно время падения?Сопротивлением воздуха пренебречь.

Answer 1

время падения t = (v -v0) /g = (40-0) /10 = 4c

Answer 2

V=gt
t=V/g=40/10=4 c  - время падения

Answer 3

Calculation of Time of Fall

To calculate the time of fall for an object that falls from a certain height with zero initial velocity and hits the ground with a velocity of 40 m/s, we can use the equation of motion for free fall:

h = (1/2)gt^2

Where: - h is the height from which the object falls - g is the acceleration due to gravity (approximately 9.8 m/s^2) - t is the time of fall

In this case, we can assume that the object falls from a certain height h0 and hits the ground with a velocity of 40 m/s. We need to find the time of fall.

Using the equation of motion, we can rewrite it as:

h0 = (1/2)gt^2

Rearranging the equation to solve for t:

t = sqrt((2h0)/g)

Now, let's substitute the given values into the equation:

t = sqrt((2 * h0) / g)

From the given information, we don't have the value of h0. Therefore, we cannot calculate the exact time of fall without knowing the initial height from which the object falls.