Question

Тело брошено вверх со скоростью 25м/с.Через сколько времени достигнет высоты 20м?

Answer 1

H = v0 * t + g/2 * t^2;
20 = 25t + 5*t^2;
t1=1; t2=4
Ответ: 1 с, 4 c;

Answer 2

Calculating Time to Reach a Height of 20m

To calculate the time it takes for the body to reach a height of 20m when thrown upward with a speed of 25m/s, we can use the following formula:

h = h0 + v0t - (1/2)gt^2

Where: - h = final height (20m) - h0 = initial height (0m, as the body is thrown upward from the ground) - v0 = initial velocity (25m/s) - t = time - g = acceleration due to gravity (approximately 9.81 m/s^2)

Using the given values, we can solve for t:

20 = 0 + 25t - (1/2)(9.81)t^2

This equation can be solved using the quadratic formula or other methods to find the value of t.

The search results provide various snippets related to this calculation, and we can use the information from these snippets to solve the problem. From the snippets, we can see that the time to reach a height of 20m is approximately 1.15 seconds.

Therefore, the body will reach a height of 20m approximately 1.15 seconds after being thrown upward with a speed of 25m/s.