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Title
Golf ball Catapult

Broad Question
Whats the best angle for the blocker the for the ball to go the farthest.

Specific Question
does the angle of the blocker affect the distance of the ball, also does the angle of the blocker affect how far it will go.

Hypothesis
The blocker in the middle will go the farthest because it wont go to high and it wont go straight

Independent Variable:
The angle of the catapult

Dependent Variable:
Distance of ball

Variables That Need To Be Controlled:
weight of ball size of ball type of ball angle of blocker speed of release Angle of blocker

General Plan
Building catapult then testing witch angle makes the ball go the farthest and measuring it in meters.

Potential Problems And Solutions
none

Safety Or Environmental Concerns
none

Number Of Comparison Samples:
3 samples for each of the 3 tests.

Number Of Observation In Each Sample:
1 for each test.

When data will be collected
In early april.

Where will data be collected?:
on my wiki space page.

Resources and Budget Table

 * Items || Cost $ ||
 * pvc pipe || $ 8.40 ||
 * pvc pipe fittings || $ 28.00 ||
 * golf balls || $ 3.00 ||
 * springs || $ 6.00 ||

Data Table
= =
 * trial 1 90 || trial 2 105 || trial 3 115 ||
 * 20"6" || 18"6" || 19"2" ||
 * 20"4" || 18"4" || 19"10" ||
 * 20"10" || 18"4" || 20"8" ||

Time Line
Early March - Get design finished. Mid March - Start building. Late March - Finish the building and get ready for collecting data. Early April - Start collecting data. Mid April - Finish collecting data. Late April - Finish wiki space. Early May - finish poster. Get ready for science fair

Detailed Procedure

 * Get half inch PVC pipes and fittings.
 * Cut them to what ever the size if your base will be, and what you wont the high to be.
 * Get two long springs and drill two holes on the opposite side of the catapult.
 * Make a holder For the golf balls with random PVC part and fittings.

Diagram
none

All Raw Data
Look at data Table Above

Photos




Conclusion
My hypothesis was wrong the ball went the farthest at the angle i thought was going to be the least.There needs to be further studies on this because when i started to test the PVC started to pop loose from its socket.

Benefit to Community and/or Science
The people will know the best angle for future catapult experiments.

Abstract
I was testing what was the best angle for a blocker on the catapult.While i was researching all the catapult pictures i saw had a blocker at 90 degrees. Once i did my experiment i found out that my hypothesis was wrong, "The blocker in the middle will go the farthest because it wont go to high and it wont go straight." when i was all well and done the data showed that 90 degrees was the best angle.