Statics: Lesson 12 - Statics About a Particle, 3D Resultant of Vector Forces

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[amandasolorio]

I am literally about to cry, my entire class is struggling so much, our teacher goes through problem and doesn’t explain anything he doesn’t even finish the problems and then laughs when we are all confused. Ive watched all of the lesson videos prior to this one and i just did what you suggested and wrote the problem down solved it and skipped to the end and I got the entire problem right and actually understood everything behind it. I cannot express how incredibly grateful to you I am right now for posting these videos. This is the first time all semester I’ve actually thought I might be able to do this.

[davidjones]

You are the best instructor I have seen who actually explains the math instead of just giving formulas and punching in numbers. Your friendly communicable style is truly commendable, making us think at the same time. Thanks it's a thumbs up from me.

[lcsk]

@12:45 "Piece of Crack... I mean piece of CAKE!!" I just died.

[dontworry]

this guy explains things so much better than my instructor. im just going to use this guy to study. pay attention enough in class to write it out the way my instructor wants it.

[rpruneau]

Very good use of all methods. Would have been nice if only two of the directional cosines were given and had to solve for the third using the cos2 identity!

[Peter_]

These kinds of problems are really cool;
it is always hugely rewarding when lots of concepts are covered in one single problem.

[nlb]

hello Dr Hanson you are a great instructor thank you so much for all you do your channel is amazing

[mohamednuskhan]

What a great lecturer. I love your teaching method. It's very funny and not boring 😊
Thank you so much for your service

[wowieitssam]

Aah thank you! I was confused by the different ways to find the vectors, and ended up making a thousand triangles to solve them all one way. So so helpful! ^_^

[Abelabiliomason]

Sir, is F3 not pointing to negative z?

I am confused if it should be +2k or -2k

[georgesadler]

DR. Hanson, thank you for a awesome lecture on 3D Vectors that use all three methods.

[khalidalhashimi]

Wow Dr. Jeff you are super super super super super super super AMAZING !!!

[kylejohnson]

Oh snap it’s blue shirt jeff i only ever heard legends.

[speedbird]

The directional cosine rule and the use of spherical coordinates is really awesome. Thanks for your video lectures.

[marcialm]

Wow thank you! This lesson was fun to learn

[jessicaavellaneda]

Best professor ever. please come to my university

[johnsterling]

it would be extremely helpful if you some how corresponded your videos to the book chapters. Trying to review problem R3-3 from the book but can't figure out which one of your videos covers this.

[fadyahalzaidi]

Thank you so much. For F3, z coordinates, shouldn't that be (-2), not (2)?

[garrettgeffre]

For anyone out there please, for your sake, do not go to South Dakota school of mines. The ME department will not teach you. All the professors will do is say read your book then come to class. That is great and all, but none of them will do any examples on how to do the work. In fact, my professor said he will not be using the board in the classroom because he hates erasing the board. He only uses pre done slides in PowerPoint which are hastily put together annd also are not bulleted making them a nightmare to try and decipher. Save your money and sanity, buy a statics book and do all the questions in the back of the book. Use chegg if you have to, but still try and learn it. There is no reason to pay any institution to take your money and not help or teach you the skills needed to be a successful and competent individual in that field or study.

[kristianportillo]

at time 9:44 why is the x-coordinate 4? Shouldnt it be 5ihat? Not 4ihat? Can someone explain? Please and thank you!