Question

тело брошено вертикально вверх с начальной скоростью 20м/с. Какова скорость тела через 0,5 с после начала движения?

Answer 1

скорость равна 15м/с

υ= υ 0 - g t

где, g=10

Answer 2

по формуле h= V(нач)*t -(g*t^2)/2 имеем: h= 20*0,5 - (10*0,25)/2=10-1,25=8,75

теперь используем формулу h=((v+v(нач))*t)/2; 8,75=(v+20)/4; v=35-20=15

Итак, v=15

Answer 3

Calculating the Velocity of an Object Thrown Vertically Upward

When an object is thrown vertically upward with an initial velocity of 20 m/s, we can calculate its velocity after 0.5 seconds using the following formula:

v = u + at

Where: - v = final velocity - u = initial velocity - a = acceleration (in this case, due to gravity, which is approximately 9.8 m/s^2) - t = time

Substituting the given values: - u = 20 m/s - t = 0.5 s - a = -9.8 m/s^2 (negative because the acceleration due to gravity acts in the opposite direction to the initial velocity)

We can calculate the final velocity using the formula: v = 20 - 9.8 * 0.5

Calculating: v = 20 - 4.9 v = 15.1 m/s

So, the velocity of the object after 0.5 seconds from the start of its motion is 15.1 m/s.

[[8 #]]