Physics of Sport - Football
INITIAL VELOCITY
From the data that I collected, I know that the final vertical velocity at max height is 0m/s and that the time at maximum height is 0.515s. Acceleration due to gravity (-9.8m/s² see data collection) is also presnt when finding the intial velocity. Since I have the final vertical velocity of the ball, the time and maximum height, and acceleration due to gravty, I can determine the initial vertical velocity.
After finding the initial veritical velocity I found the initial horiontal velocity in order to find the actual initial velocity. I had all of the variables I needed to find the initial vertical velocity which were that the horizontal acceleration is 0m/s², the horizontal displacement is 9.02m, and the time is 1.03s.
Once I had the initial vertical and horizontal velocity I can now use those numbers to find the actuallyinitial velocity of the football and the angle the football was thrown at.
Therefore the actual initial velocity of the football is 10.1m/s (30⁰ above the horizontal).
The initial vertical velocity of the football is 5.047m/s.
The initial horizontal velocity of the football is 8.76m/s.
FINAL VELOCITY
I have alll the required information to find the final velocity:
Vvi = 5.047m/s
ag = 9.8m/s²
t = 1.03s
Vvf = ?
Therefore the final velocity of the football is -5.047m/s (landed at an angle of 30⁰).
Seattle Seahawks quaterback Russel Wilson.