With waht speed must a baseball be thrown upward from the ground in order to reach the top of the Washington Monment? (The top of the monument is 55o ft)

Answer 1

Well, we would have to ignore air resistance which would have a major effect here but (using english units because you used feet):

v = Vo - 32 t
v = 0 at top
Vo = 32 t

h = 0 + Vo t - 16 t^2

550 = 32 t^2 - 16 t^2 = 16 t^2
t^2 = 34.4
t = 5.86 seconds
Vo = 32 t = 187 feet/second