Question

Унаслідок удару футбольний м'яч набув певної швидкості визначте початкову швидкість м'яча якщо на висоті 5 м над землею м'яч мав швидкість 20 м/с Дам 100 балів

Answer 1

Відповідь: ≈ 22,4 м/с

Пояснення:

Answer 2

Calculating the Initial Speed of the Soccer Ball

Let's break this problem down step-by-step:

1. The question states that at a height of 5 m above the ground, the soccer ball had a speed of 20 m/s. This gives us our known data point.

2. To calculate the initial speed of the ball after being kicked, we can use the formula for vertical motion under constant acceleration due to gravity:

`s = ut + (1/2)at^2`

Where:

`s` is the displacement (height) `u` is the initial speed `t` is the time `a` is the acceleration due to gravity (9.8 m/s^2)

3. Plugging in the values we know:

`5 m = u * t + (1/2) * 9.8 * t^2`

4. Solving this equation for `u`, the initial speed, gives:

The initial speed of the soccer ball was 25 m/s.