Como parte de una prueba de tiro vertical se lanza una roca, con una antigua catapulta romana, verticalmente hacia arriba con una velocidad inicial de 100m/s

Translated from Spanish language:

"As part of a vertical shooting test a rock is thrown, with an ancient Roman catapult, vertically upwards with an initial speed of 100m / s."                                                                                                                    

Explanation:

As, the motion can be termed as  more of a projectile form, while the initial velocity of the projectile or the body in motion is about a 100m/ s. We can easily determine the final velocity, Vf of the body by the following equation given as follows.And, let say that the initial time taken is about 2 seconds.So, we can put the values of the gravity, along with the time,t in the following equation and get a valid result for all of this in a more proper way.Vy= V(x)- gt, ⇒ V(y)= 100- (9.8)×(2 seconds),V(y)= 80.4 m/sec.  "Answer"