Angular momentum and cross product

[@Khgxcji]

This is very helpful. Thanks Dr.Anderson. May Allah bless you.

[@yoprofmatt]

Thanks! Keep up with the physics. Cheers, Dr. A

[@hannakennedy3720]

I just found your videos, they are amzing and I wish I found your youtube page sooner!

[@yoprofmatt]

Thanks. Keep up with the physics! Cheers, Dr. A

[@CountGrishnakh]

Thank you! Might I add, your voice is very calming!

[@carultch]

One explanation I've heard for why it is called L, is that it commonly is based on two perpendicular vectors (r and p), and L looks like two perpendicular vectors. One of the rare examples where the appearance instead of pronunciation, determines our letter choice. I've also seen H for Hamilton, when the writer wants to keep L available to stand for something else.

[@manuboker1]

The best Physics teacher in the World !!! 😎

[@NomanNazir-c3o]

❤❤

[@jamesranawadia]

holy shit, Ryan reynolds

[@yoprofmatt]

Khuzaim Ranawadia, Flattering, although a bit of a stretch. Thanks for the comment, and keep up with the physics! You might also like my new website: www.universityphysics.education Cheers, Deadpool

[@Anteater23]

I don't get how L can be the cross product of these two vectors. Because the angular momentum will then be perpendicular to the linear momentum of the particle at a given time.

[@carultch]

It's a convention. There is no physical reason it has to be in that direction, just that we had to assign a direction, and directing it along the axis of rotation toward the "north pole" of rotation is the convention we agreed upon. The reason the angular quantities get a direction assigned along the axis of rotation, rather than a direction in the plane of rotation, is that it reduces the number of options to arbitrarily choose from to reduce 360 degrees worth of options, to just two options. We could've just as easily used a left-handed convention for angular quantities and defined the direction along the axis toward the "south pole" of rotation, but we opted for the north pole and a right-handed convention.

[@Dewon537]

Thank you sir

[@PrabhjotSingh-kj8ey]

that was very helpful, Thank You

[@stevedaguy9639]

Are you writing all of that mirrored????

[@yoprofmatt]

Steve, Not writing backwards (I'm not that talented). The board is called Learning Glass. You can check it out at www.learning.glass Cheers, Dr. A

[@ahmadsaeed4323]

+Matt Anderson please do a video based on The equations of motions,love your work by the way

[@yoprofmatt]

+ahmad saeed Thanks, this might help: kzbin.info/www/bejne/eXWwZJeAidaHjcU Cheers, Dr. A

[@luislopez3198]

i would like to set up an appointment for your office hours.

[@yoprofmatt]

Come to San Diego and we'll work it out. Cheers, Dr. A