What is this piece for: Angles and Rubber Bands

1. What is this piece for: Angles and RubberBands Completed Slingshot withTarget

2. Discover new hands-on builds and programming opportunities to further your understanding of a subjectmatter.

3. The Completed Look of the Build Completed Slingshot andTarget The Slingshot is used to throw objects at the Target. Make sure that the area is clear of any people or things that couldbreak!

4. BuildInstructions

40. Exploration • Now that the build is finished, consider its design. Answer the following questions in your engineeringnotebook: • How does the Slingshot work? Explain with details. • How are the angle beams important to the Slingshot's build? Are there pieces besides angle beams that could have been used? Explain withdetails. • How is the rubber band important to the Slingshot's build? Is there a piece that could replace the rubber band and still be effective? Explain withdetails.

41. Test your build, observe how it functions, and fuel your logic and reasoning skills through imaginative, creativeplay.

42. Rubber Bands andAnchors Rubber Band being held by a Rubber BandAnchor • The Slingshot's Rubber Band • The rubber band within the Slingshot is the most important part because you cannot shoot anything without it. Your Slingshot's build was created using one of the Rubber Bands and both Rubber Band Anchors from the VEX IQ kit. The Rubber Band Anchors are important because they are the only parts that are designed to hold a rubber band and attach to other VEX IQ parts. • These are the important features of a Rubber BandAnchor: • A groove on one side that can hold the end of a rubber band • Two holes for builds with the anchor securely connected so that it doesn't move • One hole for builds with the anchor connected at only one point so that it can pivot when the rubber band ispulled

43. Shooting with theSlingshot 1. Thinking aboutshooting You have built a Slingshot and its Target. Look at your Slingshot and consider which pieces in your kit are safest for shooting indoors. You can combine pieces if youwant. Now look at the Target. Consider which pieces are likely to make it easiest to hit thetarget.

44. 2. Designing theammunition Keeping a record in your EngineeringJournal Use your Engineering Journal to design plans for a few different things that are safe to shoot. Make sure to write down the names of the pieces and try to sketchthem.

45. 3. Testing yourSlingshot Build and test the ammunition that you designed. Take notes in your Engineering Journal about what you liked and didn't like about each of your options. You can make changes to them and test them again but be sure to take notes about what you changed, why, and how that improved them - or didn't, depending on the results of yourtesting. 4. Thinking about your Slingshot'sbuild 45 Degree Angle Beam228-2500-148 You built your Slingshot with two 45 Degree Angle Beams that attached to the top of the Slingshot's fork. The Rubber Band Anchors were then connected to the angle beams and held your Rubber Band up above the fork. That's why you used angle beams to do it;they

46. hold the Rubber Band Anchors in place above the fork and at an angle so that the Rubber Band is stretched.

47. Identifying AngleBeams How to Identify the Different Angles of theAngled Beams There are four different types of beams that have a bend at an angle: 30o Angle Beams, 45o Angle Beams, 60o Angle Beams, and Right Angle (90o) Beams. There are also three types of Right Angle Beams: 3x5, 2x3, and Offset. The best way to tell which angles are which is to stack the beams on top of each other. Then you can compare how they look. You can also use a protractor to measure the angle of thebeam.

48. Angling withBeams 1. Finding all of the AngleBeams All of these beams are in your VEX IQ kit. Your build already has two 45 Degree Angle Beams in it. Find at least two of the other types of angle beam. You will need two if you're going to replace the 45 Degree Angle Beam with a differentone. 2. Deciding which option isbest Look over your Slingshot and your ammunition options. Is there an Angle Beam that would work better for shootingthose? Do you want the Rubber Band higher and farther away from the fork so that ammunition can be bigger? Or, do you want the Rubber Band lower and closer to the fork so that the fork is stronger and you can pull back farther on the RubberBand?

49. 3. Planning in your EngineeringJournal Keeping a record in your EngineeringJournal Write down whether you want the Rubber Band to be higher and farther, or lower and closer, to the Slingshot'sfork. Write down which angle beams you can use to do that. Then sketch and plan your new design. Then build your improved Slingshot and test your ammunition again by shooting it at the target. Test and improve your design iteratively until you are happy with yourresults. If you designed your Slingshot with angle beams greater than 45 degrees, then you could probably succeed with larger ammunition. The 4x4 Offset Right Angle Beam provide the greatest height for the Rubber Band Holders. However, then the holders need to be connected with the groove on the outside of the build which stretches the Rubber Band more tightly. That isn't a problem but something to test and make sure that it works in your design. If you designed your Slingshot with angle beams less than 45 degrees, then you probably needed smaller ammunition because the Rubber Band is closer to thefork. After you complete the readings about using Rubber Bands and Angle Beams in your robots, you will have another chance to improve yourSlingshot.

50. Become a 21st century problem solver by applying the core skills and concepts you learned to other problems.