Question

Тiло кинули горизонтально з висоти 40 м зі швидкістю 5 м/с. визначте дальність польоту тіла і швидкість тіла в момент удару об землю. Опором повітря знехтувати.​(Срочно будь ласка)

Answer 1

Ответ:   14,1 м   28,7 м/с

Объяснение: Див. додаток

Answer 2

To determine the distance traveled by the object and its velocity at the moment of impact, we can use the equations of motion. Since we are neglecting air resistance, we can assume that the only force acting on the object is gravity.

Let's break down the problem step by step:

Given:

- Initial height (h) = 40 m - Initial velocity (u) = 5 m/s - Acceleration due to gravity (g) = 9.8 m/s^2

Finding the time of flight:

The time it takes for the object to reach the ground can be found using the equation:

h = ut + (1/2)gt^2

Substituting the given values:

40 = (5)t + (1/2)(9.8)t^2

Simplifying the equation, we get a quadratic equation:

4.9t^2 + 5t - 40 = 0

Solving this equation, we find two possible values for time (t). We'll consider the positive value since time cannot be negative.

Finding the distance traveled:

The distance traveled by the object can be calculated using the equation:

s = ut

Substituting the given values:

s = (5)t

Finding the velocity at the moment of impact:

The velocity of the object at the moment of impact can be calculated using the equation:

v = u + gt

Substituting the given values:

v = 5 + (9.8)t

Now, let's calculate the values:

Calculation:

Using the quadratic formula, we find that t ≈ 1.84 seconds.

- Distance traveled (s) = (5)(1.84) ≈ 9.2 meters - Velocity at the moment of impact (v) = 5 + (9.8)(1.84) ≈ 22.9 m/s

Therefore, the distance traveled by the object is approximately 9.2 meters, and the velocity at the moment of impact is approximately 22.9 m/s.

Please note that these calculations assume idealized conditions and neglect air resistance.