Question

тело брошено вертикально вверх с начальной скоростью 30м/с. через сколько секунд оно будет на высоте 25 метров? смысл ответа пояснить

Answer 1

Calculation of Time to Reach a Height of 25 Meters

To calculate the time it takes for an object to reach a height of 25 meters when thrown vertically upwards with an initial velocity of 30 m/s, we can use the equations of motion. The equation that relates the final height (h), initial velocity (v0), time (t), and acceleration due to gravity (g) is:

h = v0 * t - (1/2) * g * t^2

In this case, the initial velocity (v0) is 30 m/s and the acceleration due to gravity (g) is approximately 9.8 m/s^2. We need to solve for the time (t) when the height (h) is 25 meters.

Substituting the given values into the equation, we have:

25 = 30 * t - (1/2) * 9.8 * t^2

To solve this quadratic equation, we can rearrange it to the standard form:

(1/2) * 9.8 * t^2 - 30 * t + 25 = 0

Now, we can solve this equation to find the value of t.