Session Overview
Covered this week: Computer-generated free body diagrams for a moving elevator. Image courtesy of Waifer X 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 7: Degrees of Freedom, Free Body Diagrams, and Fictitious Forces
Lecture 7: Degrees of Freedom, Free Body Diagrams, and Fictitious Forces
> Download from iTunes U (MP4 - 226MB)
> Download from Internet Archive (MP4 - 226MB)
- Video Chapters
- Muddy card discussion
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Degrees of freedom and free body diagrams
Degrees of freedom and free body diagrams
> Download from iTunes U (MP4 - 226MB)
> Download from Internet Archive (MP4 - 226MB)
- Example 2: Hockey puck
- Example 3: Rod leaning on a wall
- Free body diagrams with two bodies
- Fictitious force in the elevator
- Fictitious centrifugal force
- Video Chapters
- Watch
Lecture 8: Fictitious Forces and Rotating Mass
Lecture 8: Fictitious Forces and Rotating Mass
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
- Video Chapters
-
Reading assignment from Williams on kinematics
Reading assignment from Williams on kinematics
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
-
Concept questions intro showing problems
Concept questions intro showing problems
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
-
Concept question discussion-spool and string etc
Concept question discussion-spool and string etc
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
-
Fictitious force: elevator cable breaks
Fictitious force: elevator cable breaks
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
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Demo of cart on incline with water in container
Demo of cart on incline with water in container
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
- Complete fictitious force discussion
-
Rotating mass demo related to homework 1
Rotating mass demo related to homework 1
> Download from iTunes U (MP4 - 233MB)
> Download from Internet Archive (MP4 - 233MB)
-
Reading assignment from Williams on kinematics
- Video Chapters
Recitation Video and Notes
- Watch
Recitation 4: Free Body Diagrams
Recitation 4: Free Body Diagrams
> Download from iTunes U (MP4 - 141MB)
> Download from Internet Archive (MP4 - 141MB)
- This recitation reviews free body diagrams and covers a problem with a torsional spring pendulum followed by a second problem with a rolling pipe on an accelerating truck.
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Recitation 4 Notes: Torque and Angular Momentum, Pendulum with Torsional Spring, Rolling Pipe on Moving Truck (PDF)
- 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 in-depth explanations for the problems. Work the problems on your own and check your answers when you're done.
- Problem Set 4: Concept Question Answer Key (PDF - 1.7MB)
- Problem Set 4: Problem Solutions and Explanations (PDF)