Posted by Dreskillz89 on Monday, September 28, 2009 at 4:23pm.
A ball is thrown upward off the top of a 30meter high building. 10 meters below the top of the roof, is the top of a window, which is 2 meters high. How long (time) does it take for the ball to pass from top to bottom of the window?
What I have so far is:
10 = v(initial) t  4.9 t^2
12 = v(initial) t  4.9 t^2
How do I solve this question if I don't even have initial velocity?

physics  add.info. required  MathMate, Monday, September 28, 2009 at 7:49pm
"How do I solve this question if I don't even have initial velocity? "
You are quite right. You need additional information, for example maximum height attained, time it took to come back to the top of the roof, initial velocity, etc.
On the other hand, the height of the building (30m) is immaterial.
Answer This Question
Related Questions
 physics  a brick is dropped form the roof of a building. On the way down it ...
 Physics  Standing on the top ledge of a 55 m high building you throw a ball ...
 physics  A tennis ball is thrown horizontally at a speed of 10 m/s from the top...
 Physics  A steel ball is dropped from a building's roof and passes a window, ...
 Physics  Standing on the top ledge of a 55 m high building you throw a ball ...
 Physics  A ball thrown upward from the a point 7 meters below the bottom of a ...
 math  if a ladder 15 meters long is placed so as to reach the bottom of a ...
 physics, please help me, this question is hard  John Stands at the edge of a ...
 Physics  The ball is thrown upward with a speed of 38.0m/s from the top of a ...
 Math  A rock is thrown upward with a velocity of 24 meters per second from the ...
More Related Questions