My Project on Sports Science

Due Date:
My investigation is about (could be a question you want answered or a problem):
When you throw a football, does the spin affect the speed and place where it lands?
7th November
My hypothesis is (should be worded as a statement):
I think that the spin affects the speed of the ball, which will affect the placement.
7th November
My references used to research the question:
http://www.essortment.com/all/americanfootbal_rwff.htm
http://en.wikipedia.org/wiki/Projectile_motion
http://www.mahalo.com/How_to_Throw_a_Football ~ Step 1
http://entertainment.howstuffworks.com/physics-of-football1.htm
7th November
Materials and equipment required to conduct my investigation:
football
people
outside
measuring devices
14th November
My experimental design (the method you will use to test your hypothesis):
I will test my hyposthesis by getting a few kids from class and making them throw a football. I will tell them to make the ball spin first then not to spin. Next, i will measure how far each throw went and repeat a few times.
Title:
How spin on a football affects the change in distance from when it does not spin.
Purpose:
To determine if the spin of a football affects it speed and placement of it.
Hypothesis:
I think the spin will affect the speed and placement of the ball.
Independent Variable:
My independent variable is the ball's spin.
Levels of Indepenent Variable:
With Spin Without Spin
(Control)
3 repeated trials 3 repeated trials
Dependent Variable:
My dependent variable is the change in distance from the ball spinning and not spinning.
Constants:
The balls used, same poeple to throw the ball, same equipment, same wind speed, same place to start.
Procedure:
1. Go outside and pick 3 volunteers.
2. Give each person a ball and wait for wind to stop.
3. Tell volunteers to throw the ball WITHOUT spin.
4. Measure how far the balls went.
5. Record into a data table/notebook.
6. Repeat steps 3-5 three times with same people.
7. Repeat steps 3-6 three times WITH spin on the ball.
14th November
Conduct experiments and submit quantitative data and graphs.
See below for data table and graph.
21st November
Complete artefact for presentation:
·Voicethread uploaded to wiki
·Powerpoint converted and uploaded to Slideshare, posted on wiki
·Photostory or Vegas video uploaded to TeacherTube and posted on wiki
·Flip video uploaded to TeacherTube and posted on wiki
·Text report with photos and diagrams posted on wiki.
Make sure you include credits and complete list of References
5th December
11/18
Today I discided to do something on football. I choose to see wether the spin of when you throw a football affects the speed and placement of the ball.
Trajectory is the path that a moving object follows in space. When u throw a ball, it curves downward slowly becasue of the trajectory and gravity.
Vector is the angle at which you throw the ball. You want a slightly higher angle to make sure the ball gets to were is needs to be.
when the ball doesn't spin is has more wind resistence on it, so if the ball is spinning correctly, it will keeps its trajectory path.

11/19
The angle of the throw determines the axises it travels (horizontal and vertical)
If a football is thrown at a higher angle then it will go higher but not as far.
If a football is thrown at a lower angle then it will not go as high but will travel farther.

12/8
Trajectory - like many liquids-is the speed of the ball
Parabola - a parabola is formed when a object, anything, is throwninto the air, and it slowly curves down.




Data Table: Distance (m)


With Spin


Without Spin

Person Throwing
throw 1
throw 2
throw 3
throw 1
throw 2
throw 3
Justin
24
26
24
20
15
21
Anthony
24
18
27
17
21
19
Sydney
16
17
21
14
18
19

Average Distance (m) with Spin:
Justin : 24 1/2 meters
Anthony : 23 meters
Sydney : 18 meters
Average Distance (m) without Spin:
Justin : 18 1/2 meters
Anthony : 19 meters
Sydney : 17 meters