Physics of Sports
Video
Introduction
The goal of this project was to answer this:
How can we improve our understanding of and performance in sports by applying physics?
We had to make a video about the physics of a particular action in a sport. We chose the physics of penalty kicks.
How can we improve our understanding of and performance in sports by applying physics?
We had to make a video about the physics of a particular action in a sport. We chose the physics of penalty kicks.
Content
Force of Impact:
The force of impact of a ball on a wall is the force the ball exerts on the wall when it collides.
It is calculated as: force of impact = mass of ball * change in velocity of ball / time of impact
Velocity Vectors:
Velocity can be broken down into horizontal velocity and vertical velocity.
Gravity only affects vertical velocity.
total ^ 2 = horizontal ^ 2 + vertical ^ 2
tan angle = vertical / horizontal
horizontal = total * cos angle
vertical = total * sin angle
The force of impact of a ball on a wall is the force the ball exerts on the wall when it collides.
It is calculated as: force of impact = mass of ball * change in velocity of ball / time of impact
Velocity Vectors:
Velocity can be broken down into horizontal velocity and vertical velocity.
Gravity only affects vertical velocity.
total ^ 2 = horizontal ^ 2 + vertical ^ 2
tan angle = vertical / horizontal
horizontal = total * cos angle
vertical = total * sin angle
Actions
RunupYou should accelerate the whole time. Instead, we decelerated first and then accelerated.
KickYou should kick the ball with your shoelaces with your foot locked. You should get your foot slightly under the ball to make it fly into the air rather than fly into the ground and stop.
ContactThe force on the ball when you kick it is 356.9 Newtons, or about 80 pounds.
Your foot only contacts the ball for 0.02 seconds. Flight of BallThe ball flies 11 meters at 16.6 meters per second, or about 37 mph.
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Reflection
Overall, i was very happy with the way our project turned out. The team quickly came to a consensus on the sports action. I also did well with the calculations, especially curve-fitting to find the velocity verses time graph. I think doing the calculations is a good role for me.
However, some things didn't work so well. At one point, we lost focus and ended up just playing soccer. Also, as we got closer to the deadline, work slowed down. I think I need to work on staying focused.
I learned that I am more of a team member than a team leader. Also, as I said before, I learned that doing the calculations is a good role for me.
However, some things didn't work so well. At one point, we lost focus and ended up just playing soccer. Also, as we got closer to the deadline, work slowed down. I think I need to work on staying focused.
I learned that I am more of a team member than a team leader. Also, as I said before, I learned that doing the calculations is a good role for me.
Note: The video says that the speed of your foot is 16.6 m/s, but that is the speed of the ball.
Also, at 1:31 to 1:34, it displays:
mv=Ft
F=mv/t
F=0.43kg*16.6m/s
F=356.9N = 80.23lbs
It should display:
mv=Ft
F=mv/t
F=(0.43kg*16.6m/s) / (0.02s)
F=356.9N = 80.23lbs
Also, at 1:31 to 1:34, it displays:
mv=Ft
F=mv/t
F=0.43kg*16.6m/s
F=356.9N = 80.23lbs
It should display:
mv=Ft
F=mv/t
F=(0.43kg*16.6m/s) / (0.02s)
F=356.9N = 80.23lbs