Catapult ProjectEffect of Angles

ObjectiveTo know the best angle to move the object farthest, and applied the

knowledge that have learnt to explain the the result and data. We also get a

chance to learn about the relationship between angles and elasticity.

Materials1.PVC pipe with different shapes and functions 2. Cutter

Materials 3. Giant Rubber 4. Glue 5. Hook

Materials6. Eraser

Set up

Discussion of Design1. Decided the material that we are going to use for building the catapult.

2. Draw a set up or design for the catapult.

3. Buy your material.

4. Build the catapult according to the design.

5. Build up the part that helps to change the angles.

6. Use several big rubbers to tide up the main structure of catapult.

7. Launch!

DataAngle/Trials 1st Trial 2nd Trial 3rd Trial

45॰ 2.20m 2.0m 2.20m

30॰ 6.60m 5.40m 5.62m

15॰ 9.67m 9.00m 9.50m

5॰ 11.00m 9.90m 10.70m

Analysis of DataFor the analysis, which you can see the data from the previous slide, there are no much different in the trials for 45॰, the results are similar, same as the trials in other angles. But you can see the distance is getting more and more farer as we decrease the angles.

ConclusionIn conclude, there are many factors that causes the object to launch in a very far distance.

The first factor is the lesser the angles is, then the longer the distance will be.

The second is the shape, size, weight, etc of that object.

RecommendationOur group recommend in the future, the object should be measure or should be compare to make the experiment become fair and easily to contrast. The materials should be more stronger that could withstand the extensity of the rubber band that used to launch for 15॰ and 5 ॰.

ReferencesPhysics Catapult Competition. (n.d.). Retrieved from http://www.aplusphysics.com/projects/catapult.html

Cowen, A. (2016, January 22). Projectile Physics and Catapult Science. Retrieved from http://www.sciencebuddies.org/blog/2016/01/simple-catapult-science.php

Elert, G. (n.d.). Energy. Retrieved from http://physics.info/energy/

What is a projectile? (n.d.). Retrieved from http://www.physicsclassroom.com/Class/vectors/u3l2a.cfm

http://www.aplusphysics.com/projects/catapult.htmlhttp://www.aplusphysics.com/projects/catapult.htmlhttp://www.sciencebuddies.org/blog/2016/01/simple-catapult-science.phphttp://www.sciencebuddies.org/blog/2016/01/simple-catapult-science.phphttp://physics.info/energy/http://www.physicsclassroom.com/Class/vectors/u3l2a.cfmhttp://www.physicsclassroom.com/Class/vectors/u3l2a.cfm