Finding the height above a window after an object passes it

[needhelp10]

Homework Statement

A roof tile falls from rest from the top of a building. An observer inside the building notices that it takes .20s for the tile to pass her window, whose height is 1.6m. How far above the top of the window is the roof?

Homework Equations

just having trouble determining how to solve.

The Attempt at a Solution

 

[Norfonz]

Are you familiar with Newton's equations of motion?

 

[hav0c]

try v²-u²=2as
v=u+at
s=ut+1/2at²

where u=v₀

2 will be used find out which

 

[CWatters]

Remember you can't just use 1.6/0.2 to calculate the velocity. One of the equations hav0c provided can be used to calculate the velocity at the top of the window. Another to work out the distance from roof to top of window.