PHYSICS OF SPORTS VIDEO
In this project, our assignment was to teach someone learning a sport the physics of that sport to improve that movement. My group consisted of Bella Bergmark, Evelyn Vadala, and Shannon Nguyen. We worked on this project for about 3 weeks, and filmed everything at school. It was an awesome project because we got to learn how to use a video editing program, and all of the videos turned out better than I thought they would. We also learned how to find the calculations of each movement. This surprised me because there was an extreme amount of force on the ground when Bella hit it, and I expected there to be a smaller amount. During the project, we spent most of our time working on the calculations and the different ways to calculate each step of the movement.
First, we made a storyboard, finding what we would mention and deciding where to put each idea in the movie. Then, we started making calculations for the movie. Next, figured out the script for the movie. Finally, we recorded the voice overs, filmed Bella, and created the movie.
Physic Concepts:
velocity- V=d/t The rate of change of the position of an object. We found the velocity of the ball when Bella hits it. We used where the ball hit on the court for an average spike, and timed it when Bella hit the ball to when it hit the ground. It was 10.45 m/s or 23.4 mph.
acceleration- a=v/t The rate at which the velocity of an object changes over time. We used this to find how fast objects will travel. We used this is class to find how fast a person fell out of a helicopter at different points of his fall and how it changed when he used a parachute.
horizontal motion- V=d/t The movement of the body or an object on a flat plane. In class, we used this and vertical motion (below) to learn that however far something goes, as long as it's as high as the other object, will hit the ground at the same time.
vertical motion- d=1/2a(t squared) A form of motion in which an object or particle is thrown near the earth's surface, and it moves along a curved path under the action of gravity only.
potential energy- PE=mgh The energy stored in an object due to its position in a force field or in a system due to its configuration.
kinetic energy- KE=1/2m(v squared) The energy it possesses due to it's motion.The energy stored in an object due to its position in a force field or in a system due to its configuration. In class, we used this to find where a ball would hit the floor with a certain velocity and height.
mechanical advantage- MA=imput/output A measure of the force amplification achieved by using a tool, mechanical device or machine system. In class we used this to find how much easier it is to roll something down a ramp.
elastic collision- Encounter between two bodies in which the total kinetic energy of the two bodies after the encounter is equal to their total kinetic energy before the encounter. In class we used this to understand Newton's Cradle.
force- F=ma Any interaction which tends to change the motion of an object. We found the force of the volleyball player on the ball by finding Bella's weight in pounds on a scale when she jumps. Then we converted that to a force in newtons. (1340.88 N)
work- W=Fd A displacement of the point of application in the direction of the force. In class we used this to find how much work it took to move something a specific distance.
momentum- M=mv The product of the mass and velocity of an object. In class we equaled this to impulse (because they are equal) to find the force if we only had mass, velocity, and time. mv=Ft
impulse- P=Ft Force acting for a given time interval is equal to the change in linear momentum produced over that interval. We equaled this to momentum (above). We also used this to find the momentum of the ball once Bella hit it.
Reflection:
Two things that that I learned doing this project are trying to figure out how to include everyone working on one comuputer, and to understand how to manage time better. It was hard at first to include everybody, because there was only one computer, and four of us. Then, I wasn't sure whether to help everybody else, or work on things alone, like calculations. We figured it out, though, and I learned how to work it out later. Also, I learned how to manage my time better. I tryed to focus more at the beginning so I wasn't rushing towards the end. This worked really well, and I glad I did it.
Two things that I could have done better are being more accepting to the other people in my group, and working harder to make the something the best thing that it can be. I think that sometimes I can be to leading and tell people what to do instead of talking it through and reasoning it through with them. Also, I need to work harder to do my best. Sometimes I slack because I don't feel like working, but as a result I don't always learn what I needed to, and I don't get the grade I wanted. I believe I can try to fix this because they aren't huge problems and I will try to work on them.