Question

Тело брошено вертикально вверх с начальной скоростью 20 м/c. Каков модуль скорости тела через 0,5 с после начала движения? сопротивления воздуха не учитывать.

Answer 1

запишем формулу для мгновенной скорости

V=Vо-at

 

V= 20 - 10t (10 тк ускорение свободного падения)

20-5= 15м|c

Answer 2

Calculation of the Velocity of the Object

To calculate the velocity of the object after 0.5 seconds, we can use the equation of motion for an object in free fall:

v = u + gt

Where: - v is the final velocity - u is the initial velocity - g is the acceleration due to gravity (approximately 9.8 m/s^2) - t is the time

In this case, the object is thrown vertically upwards with an initial velocity of 20 m/s. Since the object is moving against the force of gravity, the initial velocity is positive. Therefore, we can substitute the given values into the equation:

v = 20 + (-9.8)(0.5)

Simplifying the equation gives us:

v = 20 - 4.9

Calculating further:

v = 15.1 m/s

Therefore, the magnitude of the velocity of the object after 0.5 seconds is 15.1 m/s