# Finding the height above a window after an object passes it

1. Aug 15, 2012

### needhelp10

1. The problem statement, all variables and given/known data
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?

2. Relevant equations
just having trouble determining how to solve.

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. Aug 15, 2012

### Norfonz

Are you familiar with Newton's equations of motion?

3. Aug 15, 2012

### hav0c

try v2-u2=2as
v=u+at
s=ut+1/2at2

where u=v0

2 will be used find out which

Last edited: Aug 15, 2012
4. Aug 16, 2012

### 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.