Question

2. Тело свободно падает на Землю с высоты 31,25 метров. Какова будет его скорость в момент удара о Землю? (g = 10 м/с2)​

Answer 1

Дано:

h=31,25 м  

g=10 м/с^2  

v-?

Решение:  

v=√2gh  

v=√2*10*31,25=25 (м/с)

Answer 2

Calculation of the velocity of a freely falling object

To calculate the velocity of a freely falling object when it hits the ground, we can use the equation of motion for uniformly accelerated motion:

v^2 = u^2 + 2as

Where: - v is the final velocity (which we need to find) - u is the initial velocity (which is 0 for a freely falling object) - a is the acceleration due to gravity (given as 10 m/s^2) - s is the displacement (which is the height from which the object falls)

In this case, the object falls from a height of 31.25 meters, so s = 31.25 m.

Substituting the values into the equation, we have:

v^2 = 0^2 + 2 * 10 * 31.25

Simplifying the equation, we get:

v^2 = 625

Taking the square root of both sides, we find:

v = 25 m/s

Therefore, the velocity of the object when it hits the ground is 25 m/s.