We were assigned to create a Physics of Sports video to help San Marin Athletics. For our video we decided to demonstrate an overhand volleyball serve. We started out the project with creating a storyboard. This was a brief overview of all the shots we planned on taking. This ended up being changed as our project evolved. We then created a script of all the lines we were going to say in our video. We had to calculate many things including vertical velocity, horizontal velocity, force, etc. We had to time, measure, and film Lara doing a bunch of serves in order to get these numbers. After we got enough footage we imported all the film into MovieMaker and started editing. First we put all the footage in order and then started recording all of our voice-overs. This was a very useful technique which allowed us to demonstrate the volleyball serve while explaining how to best do it. Then we tweaked our project to make sure the audio was loud enough, everything flowed together, and there was music in the silent parts. In the end, we had a very successful Physics of Sports Video.
Physics Concepts We Used:
Horizontal Velocity is the change in horizontal distance over the change in time.
We used the horizontal height and divided it by the change in time . Our final horizontal velocity was 15.65 m/s or mph.
Vertical Velocity is the change in vertical distance over the change in time.
We divided by and got 2.94 m/s or 6 mph.
The next thing we found was the force of our hand on the volleyball. We used the formula mv+Ft. M equals mass, v= horizontal velocity, F= force, and t= the time your hand touches the ball. We plugged .27 kg (the mass of the ball) for the mass, the horizontal velocity of 15.65 m/s for velocity, and then we plugged in the time of 1/120 of a second or .0083333 of a second. Then we multiplied and divided to find the force of 505 N or 114 lbs.
Reflection: My group and I did some things really well and other things not so much. One thing we did well was once we all set our mind to working hard, we finished a ton and were really productive. One thing I think I did well was leadership. On some projects I don't really know what to begin working on and I end up waiting for someone to tell me what to do. This time however I just started working regardless of who else was working and gave myself jobs. This really helped our project move along smoothly. Some things my group and I didn't do great on were staying on task and time management. For the first couple days we just screwed around on this storyboard website and didn't get anything done. This really effected us in the end when we all had to do twice as much work. This resulted in lunches and other class time working on the project. Also, many off topic conversations occurred which derailed us from working on the project. It was hard once we had moved so far from the original topic to move us back. Another challenge our group faced was MovieMaker's errors. Thank goodness Lara and Taylor had worked with it before or we would have been so confused. Sometimes MovieMaker would delete our audio and we couldn't retrieve it so we'd have to re-record it over and over. Some things I'd like to work on for the next project is even when I'm tired and I want nothing more than to talk about something else during the project, I have to keep working. Because if I don't it will just cause stress at the end.
Horizontal Velocity is the change in horizontal distance over the change in time.
We used the horizontal height and divided it by the change in time . Our final horizontal velocity was 15.65 m/s or mph.
Vertical Velocity is the change in vertical distance over the change in time.
We divided by and got 2.94 m/s or 6 mph.
The next thing we found was the force of our hand on the volleyball. We used the formula mv+Ft. M equals mass, v= horizontal velocity, F= force, and t= the time your hand touches the ball. We plugged .27 kg (the mass of the ball) for the mass, the horizontal velocity of 15.65 m/s for velocity, and then we plugged in the time of 1/120 of a second or .0083333 of a second. Then we multiplied and divided to find the force of 505 N or 114 lbs.
Reflection: My group and I did some things really well and other things not so much. One thing we did well was once we all set our mind to working hard, we finished a ton and were really productive. One thing I think I did well was leadership. On some projects I don't really know what to begin working on and I end up waiting for someone to tell me what to do. This time however I just started working regardless of who else was working and gave myself jobs. This really helped our project move along smoothly. Some things my group and I didn't do great on were staying on task and time management. For the first couple days we just screwed around on this storyboard website and didn't get anything done. This really effected us in the end when we all had to do twice as much work. This resulted in lunches and other class time working on the project. Also, many off topic conversations occurred which derailed us from working on the project. It was hard once we had moved so far from the original topic to move us back. Another challenge our group faced was MovieMaker's errors. Thank goodness Lara and Taylor had worked with it before or we would have been so confused. Sometimes MovieMaker would delete our audio and we couldn't retrieve it so we'd have to re-record it over and over. Some things I'd like to work on for the next project is even when I'm tired and I want nothing more than to talk about something else during the project, I have to keep working. Because if I don't it will just cause stress at the end.