Question

Стрела выпущена из лука вертикально вверх со скоростью 20 м/с. Определите скорость стрелы на высоте 15 м. Срочно плизззззз

Answer 1

Объяснение:

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Answer 2

Calculation of the arrow's velocity at a height of 15m

To determine the velocity of the arrow at a height of 15m, we can use the principles of projectile motion. Assuming there is no air resistance, the vertical component of the arrow's velocity remains constant throughout its flight.

Given: - Initial velocity (u) = 20 m/s (upwards) - Height (h) = 15 m

We can use the equation for vertical displacement in projectile motion to find the final velocity (v) at a given height:

v^2 = u^2 + 2gh

where g is the acceleration due to gravity (approximately 9.8 m/s^2).

Substituting the given values into the equation:

v^2 = (20 m/s)^2 + 2 * 9.8 m/s^2 * 15 m

Simplifying the equation:

v^2 = 400 m^2/s^2 + 294 m^2/s^2

v^2 = 694 m^2/s^2

Taking the square root of both sides to find the velocity:

v ≈ √694 m/s

v ≈ 26.34 m/s

Therefore, the velocity of the arrow at a height of 15m is approximately 26.34 m/s.