Baseball+Throw

Procedure:
1. Get materials: Camera, Meter Stick, USB Cord, Scale, Tennis ball, and Safety goggles 2. Find mass of the tennis ball using scale 3. Put meter stick on ground next to throwers feet 4. Film partners throwing the tennis ball at a wall. Make sure camera is level 5. Update video to Logger Pro 6. Draw a line across the meter stick on the video using the line tool 7. Analyze the throw using the dot tool 8. Find velocity using the dotted graph 9. Find time using the dotted graph 10. Find acceleration using Vf-Vi/Time 11. Find force by using A=Force/Mass 12. Find displacement by taking the point when the throwers arm is level to the point when the tennis ball is released 13. Convert mass of tennis ball to kilograms 14. Find work using TMEi+W=TMEf 15. Using work/time, find power

media type="file" key="103 MPH fastball....Baseball_s Next Big Thing [www.keepvid.com].flv" width="307" height="309"

After watching the video above, of the fastest baseball pitch and the video below of Ryan throwing the baseball, we are able to analyze a few differences. Even though the pitcher above has approximately the same displacement of Ryan, he is able to throw the ball with a larger velocity. Since he is able to throw the ball faster, this shows us that he is able to do more work, which causes his power to increase.



Data/Calculations:
1. Mass of the tennis ball equals 58g 2. We converted the 58g to kg so that we could use the mass in our equations 3. After finishing the dot tool on logger pro and analyzing the graphs below, we got a velocity of 15 m/s 4. Analyzing the logger pro and the graphs below, we found time was about .3s 5. Next we got acceleration by (15m/s-.178m/s)/.3s= 49.4 m/s^2 6. To get force we did 49.4m/s^2=F/.058kg, F=7.96N 7. Using logger pro, we found displacement by analyzing the pitch from the beginning of the throw to the point at which the ball was released. The answer came out to be .82m 8. We found work by using the equation: TMEi+W=TMEf, 1/2(.058)(.178)^2+W=1/2(.058)(15)^2 then work came out to be 6.52 Joules 9. Lastly, to get power we did 6.52J/.3s=21.75 Watts



Reflection/Conclusion:
The goal of this lab was to find the amount of power being used by the pitcher to throw the ball, which ended up to be 21.75 Watts. In order to find the power we needed to go through a sseries of steps and equations. First we gathered the needed materials: Camera, Meter Stick, USB Cord, Scale, Tennis ball, and Safety goggles. Next, we found the mass of the tennis ball using the scale. Before we recorded the video, we put a meter stick near the throwers feet. Then we recorded the video keeping the camera at a level position. After the video was complete, we uploaded it to Logger Pro. Then we took the line tool to create a line directly over the meter stick on Logger Pro; this line was used to help us analyze the pitch by placing dots on each part of the ball. From this we were able to calculate the velocity, time, and displacement. Using the velocity and time found, we were able to use the equation: Vf-Vi/Time to get acceleration. After calculating the acceleration, we could then use the equation: A=Force/Mass to fine the force. Before we were able to find the work, we needed to convert the mass of the tennis ball from grams to kilograms. From here we could find the amount of work done by using the equation: TMEi+W=TMEf. Lastly, after finding work, the last equation we used was Work/Time which gave us the amount of power. Overall, we thought that this project was very beneficial and covered a wide range of topics that we learned throughout the semester. This project helped give us refresh what we had learned and prepared us for the final.