Evidence of Work:
During the last two weeks we have been working on our physics of sports videos. We decided to do ours on soccer and we decided that the easiest thing in soccer to find the physics of, was a penalty kick or a pk. The first thing that we did was research what a penalty kick is and some strategies for it. The penalty kick is set up 12 yards from the goal line or about 11 meters. We found that the best place to shoot is in the corners. To do this you will need to kick the ball at about a 30 degree angle to either side and then about 15 degree angle up. Then we did the film and calculated the physics. Also we researched to see if our results matched others. The ball is about 0.425kg. You should kick the ball with about 900N of force at a speed of about 22 m/s. We found that our KE or kinetic energy was 102.85 J or joules. Finally we made the video and edited it for the last few days of the project. |
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Reflection:
Over all our group was a good group. However some of the problems or pits were that one of the group members tried to do all the work by them self and would not let anyone else work for a while. Another pit was that when we were recording the audio for the voice over we could not get the recorder to work. Then the day before we were supposed to finish we figured out the problem and finished the video. Some of the good parts or peaks were that once we fixed the problem with the recording, even though we had less time, we still finished recording that day. Another peak was even though we did not know how to use the windows editor in the beginning, we figured it out pretty fast.
Over all our group was a good group. However some of the problems or pits were that one of the group members tried to do all the work by them self and would not let anyone else work for a while. Another pit was that when we were recording the audio for the voice over we could not get the recorder to work. Then the day before we were supposed to finish we figured out the problem and finished the video. Some of the good parts or peaks were that once we fixed the problem with the recording, even though we had less time, we still finished recording that day. Another peak was even though we did not know how to use the windows editor in the beginning, we figured it out pretty fast.
Concepts:
Force: Is a push or pull. The equation is F=ma where F means force, m is mass, and a is acceleration. This happened when the foot hits the ball.
Force of Impact: The force when 2 objects meet. The equation is mv=Ft where m means mass, V means velocity, F means force, and t means time. This is when the foot hits the ball with a force.
Momentum: The tendency of a moving object to keep moving.The equation is p=mv or mv=Ft where p means momentum, m means mass, v means velocity, F means force, and t means time. An example of this is the the ball has momentum after it is kicked.
Impulse: How long and forceful something is. The equation is J=ft where J means impulse, F means force , and t means time. This happens when my foot hits the ball with a force for a certain amount of time.
Vertical velocity: The rate of covered distance in the same direction (vertical). The equation is V=agt where V means velocity vertical, ag means acceleration due to gravity, and t which means time. An example of this is the ball rising and dropping during the kick.
Velocity horizontal: The rate of covered distance in the same direction. The equation is V=d horizontal/t where d means distance, V means velocity horizontal, and t means time. An example of this is the speed of the ball traveling towards the goal.
Total velocity: The velocity combined both vertical and horizontal. You find this by using the Pythagorean theorem (a^2+b^2=c^2) where a is either vertical or horizontal velocity, b is the other, and c is the total velocity. This is both the balls velocity vertical and the balls velocity horizontal.
Force: Is a push or pull. The equation is F=ma where F means force, m is mass, and a is acceleration. This happened when the foot hits the ball.
Force of Impact: The force when 2 objects meet. The equation is mv=Ft where m means mass, V means velocity, F means force, and t means time. This is when the foot hits the ball with a force.
Momentum: The tendency of a moving object to keep moving.The equation is p=mv or mv=Ft where p means momentum, m means mass, v means velocity, F means force, and t means time. An example of this is the the ball has momentum after it is kicked.
Impulse: How long and forceful something is. The equation is J=ft where J means impulse, F means force , and t means time. This happens when my foot hits the ball with a force for a certain amount of time.
Vertical velocity: The rate of covered distance in the same direction (vertical). The equation is V=agt where V means velocity vertical, ag means acceleration due to gravity, and t which means time. An example of this is the ball rising and dropping during the kick.
Velocity horizontal: The rate of covered distance in the same direction. The equation is V=d horizontal/t where d means distance, V means velocity horizontal, and t means time. An example of this is the speed of the ball traveling towards the goal.
Total velocity: The velocity combined both vertical and horizontal. You find this by using the Pythagorean theorem (a^2+b^2=c^2) where a is either vertical or horizontal velocity, b is the other, and c is the total velocity. This is both the balls velocity vertical and the balls velocity horizontal.