Posted by Drew on Monday, February 8, 2010 at 11:57pm.
A flowerpot falls off a windowsill and falls past the window below. It takes the pot 0.42 s to pass this window, which is 1.90 m high. How far is the top of the window below the windowsill from which the flower pot fell?

Physics  drwls, Tuesday, February 9, 2010 at 7:56am
Write equations for the time to reach the top and bottom of the window. There will be two unknowns: (1) unknown distance to from window top to windowsill above (h) and (2) time to reach the top of the window (t).
Solve the two equations in two unknowns.
(1/2) g t^2 = h
(1/2) g (t + 0.42)^2 = h + 1.9
h is easily eliminated by subtracting the first equation from the second.
g = 9.8 m/s^2
Solve for t fist and then use either of the two equations to compute h. 
Physics  MIke, Saturday, November 10, 2012 at 2:31pm
.8

Physics  Kate, Sunday, September 28, 2014 at 5:46pm
1.04 m