1. The problem statement, all variables and given/known data A person throws a rock horizontally from the roof of a 50m building. The rock lands 70 m from the base of the building. How long was the rock in the air in s? I got 3.194. The online home work thingy (webassign) said I was right. With what velocity was the rock thrown in m/s? 2. Relevant equations I used the Xf equation and solved for time. Dont I just plug in the time i got in the last equation and actualy solve it? Well i tryed that but I just keep getting it wrong. 3. The attempt at a solution 70=-4.9(3.194)^2 + Vo(3.194) Is this right?