Fun Projectile Motion with football

[faymalaka]

Hey guys, my friend recently scored a great football goal and it was posted on youtube. I'm mechanical engineering uni student and i wanted to test my physics invoving projectile motion to calculate the Initial velocity of the ball.

After some calculations i came across a startling answer of around 200Km/h. This is pretty fast, but considering some of the fastest professorial soccer players shots have reaches speeds of around 200km/h, who are much older and better at football, i have some belief in my results.

For anyone interested in applying some simple projectile motion equations please let me know what you get.

*i also have attached my working*

The video:
Dimensions used: http://allsporttech.com/files/soccer-field-dimensions-diagram-lrg.gif

natural i would of had to make some assumptions:

1. Zero acceleration/deceleration in the x direction.
2. After contact with the foot the ball made a straight line (no curve) toward the top left corner.
3. The ball did not reach max height

 

[LightHero]

.Using the given dimensions i measured the ball traveled a total distance of around 65m.Assuming a constant vertical acceleration of 9.8 m/s^2, and a horizontal initial velocity of 0, i found the initial velocity of the ball to be around 200 km/h. This is obviously not an exact answer as the above assumptions are incorrect, however, it does give a rough estimate of the velocity the ball was travelling at.