Question

Тело брошено вертикально вверх со скоростью 20 м/с. На какой высоте скорость тела станет равной нулю?А. 20 мБ. 40 мВ. 60 м

Answer 1

Ответ будет :А
пишу много потому что минумим 20 символов

Answer 2

Finding the height at which the velocity of the object becomes zero

To find the height at which the velocity of the object becomes zero, we can use the equations of motion. The initial velocity of the object is 20 m/s, and we need to determine the height at which the velocity becomes zero.

Using the equation of motion for vertical motion:

v^2 = u^2 + 2as

where: - v is the final velocity (which becomes zero in this case) - u is the initial velocity (20 m/s) - a is the acceleration due to gravity (approximately 9.8 m/s^2) - s is the displacement (the height we want to find)

Rearranging the equation, we have:

s = (v^2 - u^2) / (2a)

Substituting the given values:

s = (0^2 - 20^2) / (2 * 9.8)

Calculating the expression:

s = -400 / 19.6

Therefore, the height at which the velocity of the object becomes zero is approximately -20.41 meters.

Please note that the negative sign indicates that the object is below the starting point. However, in this case, it doesn't make physical sense for the object to be at a negative height. It's possible that there may be an error in the given options for the answer.

Let me know if there's anything else I can help you with!