FFIX Choco Boy
01-17-2010, 02:43 PM
Ok, not sure if this thread would go here, the help forum, or idk where else, but here goes.
I was working on my Physics homework when I came to the last show my work problem, and I'm not sure where to go with it. The problem goes:
A ball is thrown from the top of a building toward a tall building 50 m away. The initial velocity of the ball is 20 m/s at 40 degrees above the horizontal.
a) How far above or below its original level will the ball strike the opposite wall. Declare if the ball will strike above or below the original level.
b) Calculate the angle of impact between the path of the ball and the wall.
I already have the a stuff, need the b answer, here's what I have so far.
Total time: 3.263518223 s
Y - direction
Delta Y: -10.2327929 m
Acceleration: -9.8 m/s/s (Duh)
Initial Velocity: 20 m/s X sin(40)
X - direction
Delta X: 50 m
Acceleration: 0
Initial velocity: 20 m/s X cos(40)
This is all assuming that the Earth is not spinning, is not curved, and neglecting air resistance.
I think what I need next is the Final Velocity for the Y - direction, which I can figure, but I don't know where to go from there.
I was working on my Physics homework when I came to the last show my work problem, and I'm not sure where to go with it. The problem goes:
A ball is thrown from the top of a building toward a tall building 50 m away. The initial velocity of the ball is 20 m/s at 40 degrees above the horizontal.
a) How far above or below its original level will the ball strike the opposite wall. Declare if the ball will strike above or below the original level.
b) Calculate the angle of impact between the path of the ball and the wall.
I already have the a stuff, need the b answer, here's what I have so far.
Total time: 3.263518223 s
Y - direction
Delta Y: -10.2327929 m
Acceleration: -9.8 m/s/s (Duh)
Initial Velocity: 20 m/s X sin(40)
X - direction
Delta X: 50 m
Acceleration: 0
Initial velocity: 20 m/s X cos(40)
This is all assuming that the Earth is not spinning, is not curved, and neglecting air resistance.
I think what I need next is the Final Velocity for the Y - direction, which I can figure, but I don't know where to go from there.