9. A toy is thrown vertically downwards from the top of a building and has an initial velocity of 1.5 m/s. If the height of the building is 25 m, determine
i. the velocity with which the toy hits the ground
ii. the time taken for the toy to fall
h = 25 - 1.5t - 4.9t^2
v = -1.5 - 9.8t
set h=0 and solve for t
use that t to get the velocity at impact.