30.2 Cross Product

MIT 8.01 Classical Mechanics, Fall 2016
Instructor: Dr. Peter Dourmashkin

License: Creative Commons BY-NC-SA

[pchebbi]

Crisp, precise and crystal clear explanation. Great animation! Thank you!

[brenmclean]

Great video. Helpful definition of CP.
PS. We have finally moved away from the blackboard! Well done ;-)

[borissimovic]

Can someone please explain how can the length of a vector (cross product) which is a “1D line” be equal to the area which is 2D this is somehow confusing to me?

[rvoros]

wow, he had to show right hand with left hand because video is flipped
quite tricky maneuver when explaining right hand rule :)

[chestno-hweo]

Sir, why we use sin theta in vector product

[daudkharal]

I don't get it. Is this intended for high school or college?
I mean there's no intuitional and logical basis to the concept. Also, if it's a college course, what's the need when you have uploaded Walter Levin's lectures?

[mohammedshalabi]

Hi sir. I just want to ask a question. Why is the height equals to b×sin(angle) not b×a. In another way why is the area of parallelogram doesn't equal to a×b

[John-wxzn]

You taught WRONG! Their is no such thing as the left hand rule. If you do a cross b the orthogonal vector is always pointing up.