Angular momentum | Moments, torque, and angular momentum | Physics | Khan Academy

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[kaviankalantari]

It's called L because whenever you do angular momentum you take that L

[chuckjls]

 L stands for "lomentum", just like in electronics where L stands for "linductance". Also J stands for Jinertia and b stands for "briction" in mechanics. I was told as a young student that these variable names were chosen to avoid "confusion".  Actually it is arbitrary. What could you use? If you used alpha, it would be confused with linear acceleration. Just like in the case of the L being used for inductor in electronics. You can't use "I" because for some reason that stands for iurrent (current). I guess they couldn't use "c" because that stands for capacitance -also centigrade and coulombs. What a mess.

[maxisjaisi]

I like how this video's pace is very relaxed, not so serious. Reminds me of Sal's older videos. Better quality + This pace = Thumbs up!

[decompyler]

Perhaps "L" is used because it visually looks like an angle?

[seabird]

Good explanation. Setting speed to 1.5x helped me concentrate better.

[AppliedMetaphysician]

L, from the arc described by one's hand when bending the elbow? EXCELLENT video! It's always bugged me that this stuff isn't explained in a straightforward manner.

Love the color-coding! Well done sir. I'm subscribing.

[averyvillegas]

thank you this helped sooo much...I wish you were my physics teacher

[jonathandobrowolski]

Thats so cool, was spinning on my desk chair with my arms out and in while listening and it works.

[zgsnjov]

Finally, a new physics video, could you make more differential equations videos ?

[yana]

two physics lectures in 11:18 minutes! thanks

[Nikhil-tbbo]

Great video, understood the concept perfectly.👍

Thank you😘😊

[lindale]

I love you guys!!! thank you for existing! praise the lord*

[Kaonashimusic]

3:01 momentum. mo...Mo Men Tum, angular momentum, angular, angular momentum

[namarajbaniya]

This comes from the "right hand rule" of vector cross products. The vector for the radius, r-> and the vector for the translational momentum p-> when made into a cross product : r-> x p-> = L-> Since r and p are in the x-y plane, they are perpendicular to each other and form an "L" shape when made to be part of a cross product.

[Greenjah]

4:07 Could "L" just being a visual representation of a right angle? Otherwise very cool explanation.

[kartikeyapandey]

L stands for Leonhard Euler.
most work on angular momentum was done by him .
he was a great scientist

[ThisGoPro]

decompyler Than's correct, L looks like <, which is the angular bracket.

[narekmkrtchyan]

What device do you use for writing so clearly? Is it a pad (iPad, Surface Pro, ...) or a board connected to a computer? Thanks.

[timmy---]

Angular Momentum reaxhes out and grabs a hold of inertial space.

[ricky]

I always thought its cause it represents a 90 degree angle