Torque and angular momentum

[meech-ward]

Learning Material

• Khan Academy
• Rotational Motioin Crash Course

Distributed Practice

• Varsity Tutors
• Khan Academy

Distributed Practice questions answered correctly:

• Khan

• [x] 1

• [x] 2

• [x] 3

• [x] 4

• [ ] 5

Maintenance

• Correct: 0
• Incorrect: 0

Quiz

• [x] Varsity Tutors

The quiz was cool because it had a lot of review, like centripetal force, but there's probably a better quiz for this one.

Ted Ed

https://ed.ted.com/on/j7GgOM4G Finding torque for angled forces Rotational version of Newton's second law Rolling without slipping Angular momentum of an extended object Ball hits rod angular momentum example

[meech-ward]

I spent about an hour and 10 minutes on this:

• Watch the first 3 videos and take notes.
• Watch the fourth video and stop at 5:04. Try to answer the question by yourself and continue through the video to check your answer or if you need help.
• Stop the fourth video again at 10:36. Try to answer the question by yourself and continue through the video to check your answer or if you need help.

[meech-ward]

Yesterday and today I worked on Torque, moments, & moments of inertia / Rotational Intertia.

Next time it would be good to do some problems, but the next Rotational inertia reading does have 3 exercised so maybe that's enough.

[meech-ward]

I just created ted ed videos for the following khan videos:

• Finding torque for angled forces
• Rotational version of Newton's second law

If every physics video had questions like this, it would make khan academy much better.

[meech-ward]

Yesterday I learned about and made a ted ed video for Rotational kinetic energy on the bus ride to Whistler.

Today I looked at this Khan Academy reading on Rotational inertia. I don't think it's written that well, making some things difficult to understand, but I feel I'm understanding the main points.

I made a ted ed question for Rolling without slipping

Next time Angular momentum

[meech-ward]

Angular Momentum

• video
• video
• video with question

[meech-ward]

ted ed: Ball hits rod angular momentum example

A little one on using your hand to figure out if torque is going in or out of the page. No questions. https://www.khanacademy.org/science/physics/torque-angular-momentum/torque-tutorial/v/cross-product-and-torque

[meech-ward]

I started the quiz but only finished 8 questions, I need to pick that back up next time https://www.varsitytutors.com/dashboard

[meech-ward]

• The quiz covers a lot of centripetal stuff, but that's kind of nice to review.
• Question 8 required knowledge of Period. The time it takes to do one rotation on its own axis.
• review of big G
• Review of tension

[meech-ward]

I completed the torque quiz and got one question wrong, question 9. I knew I was having trouble figuring it out, and I was going to come back to it at the end, but varsity makes it difficult to go back to a question at the beginning.

https://www.varsitytutors.com/high_school_physics-circular-motion-problems-results-facd78d8-aeca-487a-a0ba-f1d7eeeb8318

question 5 should be 25.65 question 7 should be 4.4 not 4.43