Question

Тело брошено вертикально вверх со скоростью 30 м/с спустя какое время скорость тела станет равной 20м/с

Answer 1

Вот пиши мне нужны баллы

Answer 2

Problem Analysis

We are given that an object is thrown vertically upwards with an initial velocity of 30 m/s. We need to find the time it takes for the velocity of the object to become 20 m/s.

Solution

To solve this problem, we can use the equations of motion for uniformly accelerated motion. In this case, the object is moving vertically upwards against gravity, so we can use the following equation:

v = u + at

where: - v is the final velocity (20 m/s) - u is the initial velocity (30 m/s) - a is the acceleration (due to gravity, approximately -9.8 m/s^2) - t is the time

We can rearrange the equation to solve for t:

t = (v - u) / a

Substituting the given values, we have:

t = (20 - 30) / -9.8

Now we can calculate the value of t.

Calculation

Let's calculate the value of t using the given formula:

t = (20 - 30) / -9.8

t = -10 / -9.8

t ≈ 1.02 seconds

Answer

The time it takes for the velocity of the object to become 20 m/s is approximately 1.02 seconds.