Rotational Inertia
I felt quite strongly on my understanding of Rotational Inertia and how it works in class. But, by the time the open-note-quiz came around, I noticed that I still felt unsure about my answer. Mrs. Lawrence showed us a video and a real life example of Rotational Inertia and how it works.
In the short video above, a man conducts the same kind of experiment that Mrs. Lawrence did in class, but for some reason watching it again really helped the concept to stick. Concluding that the reason the wooden block gets to the end of the ramp first is because more of its mass is closer to the axis of rotation, giving it less rotational inertia, making it move faster!
Angular Momentum
Angular Momentum was another topic we spoke about in class. I think that this video, which actually features a live classroom setting and a man creating the same effect as an ice skater has when she pulls in her arms, really helps to reinforce what we have been talking about in class.
This teacher is very animated (much like Mrs. Lawrence) and to watch someone talk about a certain topic, Angular Momentum in this case, with such enthusiasm makes it much easier to retain information.
The was one of the most helpful blog posts to me because it is very animated and easiest to understand. I like that the first is a real life, and the second is a cartoon, making it easy to juxtapose them. I also like how you separated angular momentum and rotational inertia.
ReplyDeleteI actually used the exact same video for rotational interita! I thought visually seeing that the solid, wooden wheel move faster than the hoop and then realizing that that was because of the way it's mass is distributed really helped the concept stick for me as well! And I had never seen the video about angular momentum, but the fun animation of the person talking really helped that concept stick as well.
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