Session Overview
Covered this week: Spinning tops are an example of a rotating rigid body often used as a children’s toy. Image courtesy of Sean Dreilinger on Flickr. 
Assignments
Problems and Concept Questions
Each problem set has concept questions paired with most problems. Answers to the concept questions are handed in before the overall problem set is due. You should therefore answer the concept questions in each problem set while watching the video lectures for the week. Then, use the Concept Question Answer Key (below in the Check Yourself section) to check your work before continuing to work on the problem set.
Please note that if your answer to the concept question is incorrect, it is likely that you may start down an unproductive pathway to a solution. Try to fully understand the answer to the concept question before you begin the regular problem.
Videos
Lecture Videos

Watch Lecture 12: Problem Solving Methods for Rotating Rigid Bodies
 Video Chapters
 Four classes of rotational problems
 Class 1: Rotation about fixed axis through center of mass
 Class 2: Fixed axis rotation not through center of masspendulum example
 Class 3: Unconstrained motion about center of masshockey puck example
 Equivalent forces and moments acting only upon the center of mass
 Class 4: Rotation about moving points; H/A alternative formulation in terms of H/G
 Class 4 example of the pipe rolling on a truck bed
 Video Chapters
Recitation Video and Notes
 Watch Recitation 6: Angular Momentum and Torque
 This recitation includes a concept review for the week, problems with the axis of spin on and not on the principal axis, and a discussion on finding the derivative of a rotating vector. The class concludes with a review of Quiz 1.
 Recitation 6 Notes: Moment of Inertia and Imbalance, Rotating Slender Rod (PDF  1.1MB)
 These recitation notes were compiled by Prof. David Gossard, another instructor for the course. His notes go over concepts and problems covered during the recitation sections he taught, and may not precisely correspond to the content covered in the above recitation video.
Check Yourself
Concept Question Answer Key and Problem Set Solutions
The solutions are presented in two files, one with the answers to the concept questions, and one with solutions and indepth explanations for the problems. Work the problems on your own and check your answers when you’re done.
 Problem Set 5: Concept Question Answer Key (PDF)
 Problem Set 5: Problem Solutions and Explanations (PDF)
Looking for something specific in this course? The Resource Index compiles links to most course resources in a single page.