Bouncing BallsDate: Mon, 14 Nov 1994 20:30:39 -0500 (EST) From: "Marilyn S. Heath" Subject: Geometry Project Dear Dr. Math: My name is Dan Heath. I am a ninth grader at Upper Darby High School. I am in a Honors Geometry class. I have another geometry project described below. Geometry Project Problem: Balls bounce off of solid objects. Is there a pattern to the bounce? Can you predict the bounce? Solution: "Experiment" with bouncing balls or "research" the topic in order to discover the ways balls bounce. Project: Using this knowledge you need to design one miniature golf course hole where the ball must bounce off the sides twice before making a hole in one. The design should be turned into a poster or a model. The location where the ball should bounce for a "hole-in-one" must be labeled. Evaluation: The grade will be based on the following: 1) A model or poster of your designed mini-golf hole. 2) A written summary of your experimentation and/or research, and design process (2 pages maximum). 3) An oral presentation (5 minutes maximum). The poster and oral presentation will be evaluated by your classmates as well by the teacher. I would welcome any suggestions or help you could give me on the project. Dan Heath msheath@pobox.upenn.edu Date: Tue, 15 Nov 1994 10:52:12 -0500 (EST) From: Dr. Ethan Subject: Re: new geometry project Hey Dan, I am glad to hear that you are still doing neat things with geometry. Here are a few ideas on the bouncing ball stuff. First play pool. That is kinda a joke but I do think that you would learn a lot if you just sat around with a couple of balls and bounced them off the walls. (Don't bounce them too hard, it isn't worth it to break things even in the name of science.) Compare the angle that it hits the wall with the angle that it leaves the wall. Can you find a relationship? As far as the miniature golf thing goes, again I would say that the best way might be to actually go golfing. If you can't do that then just draw some sample courses and using what you have learned about bouncing from your wall experiments, see how many bounces it would take. If you want to, think about these. _____ ___________________ / * / / | / / / * | / / / _______________| / / | | | | | | | | | | | | | | | | | | | | Hope some of these ideas help. Write back if you have any more thoughts or questions. Ethan, Doctor ON CAll |
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