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The documents and all material contained therein are (c) Dean Baird. All rights reserved. They may be used by teachers and students for classroom instruction. Beyond that, no part of these documents may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage or retrieval system, without permission in writing from the author.
GUIDES  
1  UCM
& Gravity Examples Definitions of quantities, description of equations, and workedout example problems. 
2  Uniform
Circular Motion Description of circular motion and the corresponding parameters. 
3  Planetary Data Reference Vital statistics on the sun, moon, and planets. (Not included here since it was based on a published table.) And poor Pluto has been deleted! 
4  The
History of Gravity, part 1 The story of celestial mechanics from Aristotle and Aristarchus to Ptolemy and Copernicus. The History of Gravity, part 2 The story of celestial mechanics from Brahe and Kepler to Galileo and Newton. 
5  Weighing
the Earth An account of the Cavendish experiment for determining the universal gravitational constant. 
JOBS  
1  Forced
to Go in Circles  Centripetal Force Springboard
at TPT Classroom discussion guide to develop the idea of the force needed to keep a body in UCM. 
2  Centripetal
Force Bill Springboard at TPT Classroom discussion guide to develop the equation for centripetal force. 
3  Superheroes
of Gravity  Answers 
Presentation
(Zipped QuickTime) Match the descriptors to the pictures! Physics cultural literacy for Aristotle, Ptolemy, Copernicus, Brahe, Kepler, Galieo, and Newton. 
4  Be
Newton for a Day at
TPT Stepbystep development of Newton's law of universal gravitation, starting from basic principals (circular geometry, Newton's second law of motion, and Kepler's Law of Harmony. Nice graphic motif. 
5  Gravity
Basics  Answers
 Presentation
(Zipped QuickTime) Simple ratio exercises involving the law of universal gravitation. 
6 
UCM and
Gravity WrapUp  Answers Reviews UCM algebra and Universal Gravitation calculations. 
7  Proportional Reasoning in
UCM and Gravity at TPT 
DEMOS  The unlinked titles below are available in the Conceptual Physics lab manual from Pearson Education  Amazon link  
*1* 
Will
It Go 'Round In Circles? Yet another attempt to demonstrate the "centripetality" of the acceleration in circular motion. Requires a lowfriction rotating platform and two Pasco Visual Accelerometers. I do not claim that this will "close the deal" in convincing your students. But it's another data point in their journey to understanding. And it's a groovy demo, so there's that. 
*2* 
Will
It Go 'Round in Even More Circles? This one gets at the relationship between centripetal acceleration and orbital radius on an objrct on a rotating platform. If a = v^2/R, why is there more acceleration on the outside of the platform? 
3 
Spin
the Cradle at TPT A Newton's Cradle. A rotating platform. What could possibly go wrong? 
LAB 

*1* 
Worlds of Wonder at TPT This TechLab employs the PhET simulator, My Solar System. Explore the basics of orbital mechanics. 
OTHER  
1 2 
UCM and
Gravity Begins With an M (QuickTime) Part of the "Physics Begins with an M" series. This is a QuickTime export from Keynote that has been Zipped. UCM and Gravity Begins With an M Keynote A nifty Keynote presentation of the M's. (Keynote is Apple's presentation software; PowerPoint is Microsoft's presentation software.) Trust me, neither Keynote nor PowerPoint are The Great Saviors of education. I recommend using them sparingly if at all. Better to teach! 
3  Kinetic
Karnival

Rotation
Part I at
TPT The first few minutes of this episode are devoted to uniform circular motion. The questions here refer to those minutes. The rest of the episode is devoted to rotation, a topic for AP Physics 1. 
4  The
Mechanical Universe: Kepler's Laws [TPT
question sets] This episode shows Kepler's development of his three laws of planetary motion. It includes excelelnt biographiocal information on Kepler and his difficult professional relationship with Tycho Brahe. Alternate forms accommodate students seated sidebyside. 
5  The
Mechanical Universe: The Apple and the Moon
[TPT
question sets] This episode shows Newton's development of the inverse square nature of gravitational force. It includes an excellent animation of "Newton's Cannon." Alternate forms accommodate students seated sidebyside. 
6  Space
Oddities at TPT Cinematic representations of artificial gravity 
7  UCM & Gravity Crossword  Grid  Clues Crossword puzzles are highly personalized and may not always translate well from my classroom to yours. 
8  Practice
Test Questions  Answers Sample test questions covering uniform circular motion and gravity. 
OLD STUFF and AP1 ONLY Some no longer used; some transferred to AP Physics 2. 

Uniform
Circular Motion Springboard at TPT Classroom discussion guide to develop the basic concepts and geometry of uniform circular motion. Uses Physics: Cinema Classics. 

AP1 Only 
The Rotor  Answers A determination of the coefficient of friction required in the old spinning chamber amusement park ride. Knowledge of circular motion, friction, and normal force is required. 
Centrifugal
Weight
Loss
Springboard  Answers Classroom discussion guide to develop the idea of the force needed to keep a body in UCM. 

This one's
Back! 
Be Kepler for a
Day  Answers It took Kepler 30 years and 900 pages of calculations to work this out; we move through it a bit more quickly. We start with orbital period and orbital radius data and end up with the mathematical relationship known as Kepler's Law of Harmony. 
AP1 Only 
The
Apple and the Moon Springboard 
Presentation
(Zipped QuickTime) This one's a little intense. The idea is to go through the derivations shown in The Mechanical Universe video via classroom discussion and student participation (instead of watching them passively). Significant geometry and some algebra is used. 
AP1 Only 
Journey
to the Centre of the Earth at TPT Use the Law of Universal Gravitation and the concept of density to determine what the Earth is made of. 
Galactic Weigh
Station at TPT Use the Law of Universal Gravitation to determine the mass of astronomical bodies. At least ones with orbiting bodies. 

AP1 Only 
From the
Center of the Earth to the Surface and Beyond at TPT What happens to gravity when you go inside the Earth; what happens to gravity when you move away from the Earth. 
Click here for a legend and explanation of cryptic terms and abbreviations.
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