Statics: Lesson 9 - Drill Problems Practicing Blue Triangle Problems (Spherical Coordinates)
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- Опубликовано: 6 окт 2024
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I don't usually write comments, but I had to make it this time. Thank you for making the lessons easy to follow. During my class, I have trouble following along and would much rather have a professor like you. Anyone who has you as a professor is very lucky!
You have changed my life! I might actually pass statics because of you! You are so comforting and make things so simple. Thank you so much
I was so confused on 3D forces...until I watched your video. You're much better at teaching than my professor. Thank you so much
Can you plz tell me what should we do if the axis are named different
I am so pleased I found this channel it's like discovering the mother lode of engineering mathematics and I want to say a big thank you for all your efforts. I seriously don't think I have ever encountered anyone so naturally gifted in the art of teaching as you. Simply outstanding.
You might have addressed this in a later video, but it would be helpful to see the axes in a different orientation for a couple of problems. For instance, my text book has z coming "towards" us (where the x axes are in this video), so I'm having to figure out how to adapt the information in this video to apply to those problems. I did find this video very helpful, though, and I enjoy your teaching style (this guy's got jokes!)
You made everything so simple, I'm really grateful for this. I've been practicing the transverse triangles for hours and still I wasn't getting them right but you simplified everything into just identifying the angles and plugging in. Really helpful! Thanks!
You are the man!! I know that I should call you Dr Hanson or Professor Hanson, but I just want to call you brother, Dr. Brother, Professor Brother. Thank you for what you do!
I normally HATE statics and I dread it every single day this video actually made it fun and real interactive I wish all uni students were blessed with teachers like you
You sir are a legend. Thank you for taking the time to make these videos!
I only missed 1st one that was great journey
Love from Pakistan
i finally figure this one out... Thank you so much for providing a super clean path to calculate this through.😄
Thank you so much Dr. Hanson!
For everyone confused... F1 is in the NEGATIVE Z plane so 90+30 = 120 degrees. You must look at it as the F1 is bellow the Y and X axis in the negative Z
So helpful, as always!
just to let you guys know there is a small mistake in the playlist. The lesson 9 is put before the lesson 8.
rahmat
Kimse umursamaz 🤣🤣👍
you're an amazing teacher
Dr Hanson, thank you so much for all your videos, I have watched many and have jumped around statics for a while. I am not a student , but enjoy the physical sciences and math.
I don't understand why for: F=100n, theta=50 deg, and phi=120 deg(why isn't phi = - 30 deg)
Isn't the lower half of the Z axis the negative area. Why can't the bottom half of the Z axis be negative..., since the X and Y axis are both neg. and posit. Thank you in advance
Thanks so much Professor Jeff
best teacher on the earth
Thank you!
Seriously thank you! Wish I went to TT like a lot of my friends did lol!
This video was great, made it super easy
You're a lifesaver 🙏🙏
Ooowwww meen you're a life saver, thank you thank you so much
great video and I like easy pie and not junk :)
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thank you sir for very well explanation
You explain really well
I miss the TTU logo on the side haha. is the statics series getting remade?
DR. Hanson, I found the Practicing Blue Triangle Problems a bit confusing, however at the end I understand the concepts.
You mad it simple. Bless up
THANK YOU
Tnxs man😄
Vv great work. It help me alot
this man is a god
great video! I'm trying to do these in the workbook and I'm trying to write the Cartesian vector but i don't understand how to plug in the negative phi value
thanks this realy helped❤
thank you thank you thank you so much
Shouldn't Theta z be given positive or negative sign, depending upon direction of its rotation?
In top examples you can find Z components by either "F x sin(degree) x (-1)" Here "-1" is used because vector goes to the negative side of Z Axis. Or you can just to "F x cos(90+degree)" Here cos turns the value negative by itself.
great video!
Thanks,
how about if the axes get flipped?
3:53 i did it right, sir
Hii Dr hanson your videos are super helpful to me i have a doubt in problem 3:45 theta z is 120 as 90degree +30 degree = 120 but shouldn't we add 40 degree angle between the 90 and 30 ?
The 40° is from the y-axis, not z-axis.
The way you teach in the video, is that the way you teach in class or do you skip steps?
Is the FH component always positive?
Why do not we measure the angle from the positive x axis to the vector instead of the positive x axis to the blue line ?
What is the blue line ?
How do we draw the blue line ?
If you're given a force and an unknown Force how do you go about it
❤️❤️❤️
I see in x axes we consider the direction of the angle from positive axes I mean it's been positive or negative depending on the direction but z is always positive as angel, I don't mean it's cannot be negative but look if you go left or right it's positive
Anyone can explain ¿
If this man was in fiction he would be at least high outer to boundless
You lost when you took theta z isnt it supposed to be a negative since it was in the opposite direction when you took the angles for f1
What is the book you're using sir
I think the last two examples, are confusing cause when I try to prove if I can gat the same 150N I'm getting something else how is that possible 🤔
You mentioned my name at 11.00 that is my actual name it i felt so good.
lol Cocomo?
Please can I get and Applied Electricity teacher good as Mr Hanson cause I’m struggling in Applied 😢
man i almost got this but thi keeps throwing me off xD
I am still confused about the blue line ?
I would like to request to answer my question, if it's possible.
Why is z never negative? can someone explain pls?
Hi Jeff! Greetings from Mexico 🇲🇽
I have a question, in the second example where the force is F2= 150 when we calculate the swing angle, is also correct to say that it's 340°? Like 360° - 20° =340°
they are the same angle
Not at all Luis. -20 would actually be 380. If you need the proof then just take the cosine of each on your calculator and they will be the same.
340 and -20 are definitely equivalent angles for trig functions on your calculator. Same goes for any positive/negative pair whose absolute values add up to 360
Hi, I observed that when we calculate theta_z and the vector goes into the floor, we are not considering it as negative. Since going into the floor means we are below the origin, I find myself questioning, 'Shouldn't that be considered negative now?'
No, theta z is never negative, and never bigger than 180 degrees. Remember, it’s the angle between positive z and the vector. 90degrees to the floor, plus however more degrees to the vector.
Okay thank you! Do you take video requests? I have a particular problem I've been trying to solve and having you explain it would be great! @@engineeredchannel5649
why is theta never negative?
Here could you also do 90-30 sense it would get you 60 and the sin of 60 is the same as 120 would that matter at all
Yeah, I guess that would work. You essentially did what he did but below the x and y axis.
im commenting because I still need help with something that I haven't seen you cover yet.
Its the unit vector for 3D problems. its where the final answer would look something like ---- U=.354i -.354j+.866k------ make up your own problem but how do I get from a 3d vector to have 3 decimals for my i,j, k?
You divide by the magnitude. What...what?????
Say vector A = 8i + 2j - 3k. You want to make that into a unit vector?
Okay:
a.) Take the magnitude of vector A: magnitude = sqrt(8² + 2² + (-3)² ) = 8.77
b.) Divide vector A by magnitude(8.77): = .91i + .23j + -.34k
That's it. In math, it's called "normalizing". That is dividing a vector by it's own magnitude. Now it is a "unitless" vector. It's pure direction. Keep on.
I get it now but is it always going to be the same formula, I was doing a different example I get it right but my answer for x was suppose to be my answer for y. That really confusing me why I got the right answers backwards. can you help me figure out why? one of your formula have sin..sin.. but can some be cos..cos..
GOAT!
Please sir I'm a bit confused...how did you calculate those angles you got as 40 and 120
What rule did you use
davidcortez chuks watch the previous lesson it might help :)
can theta z be negative
@@tempest9652 no, never. Always between zero and 180. Keep going!
It's better to use all positive values on phi and theta since you should always use positive values on theta.
Just to avoid errors in the long run, in case you forgot that theta should always be positive.
As in they should come form the postive x,y, and z axis?
i don't know why but am still struggling finding phi
Theta z can never be negative.
upper examples are more easy
Please if you know someone text me link
So does that mean ∅ is negative whenever the blue line goes from the origin to negative y?