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DPXJube
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Homework Statement
During the opening kickoff of a college football game, the kicker kicks a football with an initial velocity of 27.5m/s at an angle of 41 degrees above horizontal.
What is the flight time for the ball?
What is the maximum height
How far does it travel before hitting the ground?
Homework Equations
The 4 acceleration equations
The Attempt at a Solution
What I know(I'm using components in the by the way)
Here's a very lame image of what I think the problem looks like
http://desmond.imageshack.us/Himg580/scaled.php?server=580&filename=forgivemefather.png&res=medium
V1x = 27.5m/s cos41 degrees
Ay = -9.80
V1y = 27.5m/s sin41 degrees
V2y = 0(Please tell me if this is wrong)
V2x = 27.5m/s cos41 degrees
Need Dx
Need Dy
Need time
I found Dy already using the V2y^2 = V1y^2 + 2aΔd equation and rearanging it to solve for Δd
I got 16.6 for the maximum height
Now I'm trying to find the time, I thought I would be able to do this by rearanging V2 = V1 + aΔt to solve for time
It comes out like this
t = v1x - v2x/a
As you can see this already doesn't work as I'm going to end up with 0 regardless, and it definitely doesn't take 0 seconds for the ball to hit the ground.
I tried finding out Dx but that wasn't possible(or I'm rearranging wrong)
What made Dy so easy was that V2y was 0 so rearanging it was simple. But because V1x and V2x are the same rearanging it makes me run into the same problem as when trying to find out time.
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