Реферат: Science Fair Report Golf Ball Essay Research

A) Wind Speeds may effect testing. The wind speeds will effect the distance a golfball travels my having the ball ride in its gusts to a further distance it would normally travel or by screeching it to a halt, short of where it might ve landed. This may alter the data I collect and because I am unable to control Mother Nature this might render my testing unreliable because I am unable to test indoors with the facilities I have available to me.

B) The force with which each golfball is hit with will most definitely effect my test results. I may barely tap one golfball and have it travel two inches whereas, I could take a full swing at another and have it travel one hundred yards. If this happens my test is totally questionable. However, I have taken steps to control this variable. I will hook a golf club up to a swing set. Then I will pull the swing set back to a certain point and then let it go. By doing this it keeps the force steady.

C) The type of golf club that each ball is hit with will certainly effect the data which is produced during testing. If I hit five balls with a driver and the rest with a nine-iron, then the results I wont know whether its the club that s hitting the ball further or the materials inside the ball, or both. So I plan to use a pitching wedge for half of the trials and then a three iron for the other half. I will separate the data I get for each club into different data tables and compare whether the balls performed pretty much the same under each condition.

D) The conditions which each ball is subjected to might have some sort of effect on my test results. I plan to keep all the golfballs under the same surroundings (temperature, moisture level) 24/7 except when testing.

E) The color of the ball. I think this may not potentially effect the data which I collect but I have still taken some precautions. I am using all balls of the same color just to make sure my test results are valid.

F) The conditions which each of the balls was subjected to during production and distribution may have been different. There is no way I was or will be able to control this variable. I don t think this variable should potentially effect my test results either because each ball is machine processed in the virtually the same way as far as I can tell from my research. I just hope there was no difference in shipping and manufacturing between golfballs.

G) The materials of which each golfball I am testing could effect test results. Now this is my experimental variable so I suspect this to effect results but I am testing three balls of each kind. I don t know if accidentally, during production, that if I have three balls of same kind, they were filled with different materials. Let s say I bought ten Titleist balls that were all supposedly filled with a hard rubber core but instead three of them are filled with titanium. I would never know and the distances each ball traveled would vary because of the materials and the average would be different then if all the golfballs were filled with a hard rubber core.

H) Time is a big factor here. If I test on different days, the conditions from day to day may change making my test inconsistent and possibly unreliable. I will have to conduct all tests on one day.

-Experimental Variable

The variable which I am changing in this experiment is the materials inside the golfball. I have bought different types of golfballs which have different cores and inner-layers. I will be testing the distances each of these golfballs travels and recording my results.

-Control Group

There really is no set group to use as a control group for my experiment. I am going to use the standard designed golfball. A golfball that has been held as a reference point in golf technology for the past couple of years.

Hypothesis

I hypothesize that there will be quite a minuscule difference between golfballs. The materials, which the golfballs are made of, differ so little that the difference in distance should vary remarkably little.

Materials

1] A golf club with a straight shaft

2] 3 Titleist DT Spin golfballs

3] 3 Titleist HP Distance golfballs

4] 3 Top-Flite XL2000 Super Titanium golfballs

5] 3 Ultra Metalmatrix golfballs

6] 3 Pinnacle Gold Distance golfballs

7] A swingset or other device which will keep the golf club swinging at the same velocity for each trial.

8] Tees to hold the golfball up

9] An open area for the golfballs to fly through without breaking any windows or hitting any people.

10] Pen/pencil and paper to record data with

Procedure

1] First I will use duct tape to adhere the golf club to a swing so that the club swings at the same velocity every time.

2] Then I will set the golfball up on a tee in the line of fire of the club

3] Then I shall bring the club/swing back to a certain marked off point and let it go.