We can find final velocity using the equation as follows:
vf = vi + gt
Substituting our known values for vi and g we obtain:
vf = vi + gt
vf = 0 + (9.8)(1.5) [ 1.5 s since it is the time it take to reach the top and to fall back)
vf = 14.7 = 15m/s
We can find the distance traveled using
d = vit + 1/2gt^2
Substituting our values for vi, g and t we get
d = 0(1.5) + (1/2)(9.8)(1.5)^2
d = 11m
