I hope everyone is staying healthy and safe. If you’re done with your schoolwork and are getting board at home, check out these online possibilities.
I have extended my Zoom office hours from 11:00-1:00. 11:00-Noon will focus on AP, but you are welcome to join at any time. Here are instructions if you just want to phone in (without the Zoom app).
This page last updated at 1:00; more updates coming throughout the afternoon.
Contents of this post
Development of rotational kinetic energy and moment of inertia
Remember to watch the video as if you were watching a lecture, but one you can pause, rewind, etc. As you watch the video, take notes and make sure you write down questions you have.
Try out the egg carton hands-on activity at home!
Remember: Moment of inertia (I) can also be thought of as the ‘rotational mass.’
Sample Problems
Sample problem 1
Three 20.0-gram masses are 9.4 cm from an axis of rotation and rotating at 152 revolutions per minute. What is the moment of inertia of the three-object system? The strings holding the masses are of negligible mass.
Solution video
Sample problem 2
Two equal mass eggs are placed at either end in an egg carton of negligible mass. The egg carton is initially rotated about its middle. If the egg carton is now rotated about one end, what is the final moment of inertia of the eggs relative to their initial moment of inertia?
Solution video
Homework
Well, isn’t everything homework now?
TheExpertTA
Look for the assignment 3/30: Week three
Textbook
Coming soon!