1. The problem statement, all variables and given/known data If the rock is thrown from the top of the building with a velocity of 5m/s [Up]. And you know acceleration due to gravity is 9.81m/s^2 [Down]. And the height of the building is 50m. Please help! I can't find the time for it to reach the bottom! I am letting up be positive! 2. Relevant equations d = V1(t) +1/2(a)(t^2) That's the only one I can think of! Help! 3. The attempt at a solution The only way I can do it is to plug in the givens into the formula, am I doing it right or is there something more? -50=5(t)+1/2(-9.81)(t^2) 0=-4.90500(t^2)+5t+50 t=3.74s or t=-2.73s I feel stupid, please help!