MIT Physics: Spinning Bike Wheel and Conservation of Angular Momentum - By MITK12Videos
Transcript
| 00:02 | when I hold the spinning wheel , nothing crazy happens | |
| 00:06 | when I flip it , I spent back and I | |
| 00:12 | stopped flip it . I spent the question is why | |
| 00:19 | am I spinning ? So I have to force the | |
| 00:23 | turnover Now Nunes 3rd Law says that for every force | |
| 00:27 | there's an equal and opposite force acting as well . | |
| 00:30 | So when I forced the wheel the wheel of applying | |
| 00:33 | force equal and opposite onto me , causing me to | |
| 00:36 | turn . So the same thing applies when I'm on | |
| 00:39 | the ground , but the friction between my shoes and | |
| 00:42 | the ground stop me from spinning . So another would | |
| 00:45 | explain what's going on is through conservation of angular momentum | |
| 00:49 | . Now angular momentum is something that tells you how | |
| 00:51 | hard it is to either start or stop something from | |
| 00:54 | spinning and depends on two things . one How fast | |
| 00:58 | it's spinning . We call that the angler frequency to | |
| 01:03 | its shape or what we call the moment of inertia | |
| 01:06 | . So this wheels rotating counterclockwise . I'm gonna teach | |
| 01:09 | you a trick so get your right hand and I | |
| 01:11 | want you to curl your fingers in the counterclockwise direction | |
| 01:15 | and you see that your thumb is pointing upwards , | |
| 01:17 | we'll call that the positive direction . So see this | |
| 01:20 | wheel has positive angular momentum with the magnitude about angular | |
| 01:26 | momentum is conserved . That means as long as there's | |
| 01:29 | no outside forces , the total angular momentum of the | |
| 01:32 | system always stays the same . So when you flip | |
| 01:35 | this thing over and do the right hand trick your | |
| 01:38 | thumb points down or in the negative direction . So | |
| 01:42 | the annual messing with this wheel is now negative . | |
| 01:45 | So the whole system me the turntable and the wheel | |
| 01:50 | starts out at negative al when you flip the wheel | |
| 01:54 | the wheel now has positive L . So the whole | |
| 01:57 | system needs to stay negative because of conservation of angular | |
| 02:02 | momentum . So I need to spend with angular momentum | |
| 02:05 | of -2 L . That's why I spend the other | |
| 02:08 | way . Mhm mm . Yeah . |
Summarizer
DESCRIPTION:
OVERVIEW:
MIT Physics: Spinning Bike Wheel and Conservation of Angular Momentum is a free educational video by MITK12Videos.
This page not only allows students and teachers view MIT Physics: Spinning Bike Wheel and Conservation of Angular Momentum videos but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.
GRADES:
STANDARDS:
