Teachers who upload their own video instructions to the public are typically the teachers who actually truly enjoy teaching, and those people are gonna do their best to truly help their viewers, since they genuinely enjoy it. You can notice this very clearly in teachers like Jeff Hanson, Professor Leonard and Michel Van Biezen.
@@Peter_1986 so true, tbh i want to upload educational videos on programming, math, or smth else because ik people who struggle with that and if i can help someone understand something they didnt before, that would be amazing
Professor Hanson, Thank you for a solid analysis of 2D Statics on a Particle in mechanics, Drawing different types of Free Body Diagrams is very helpful.
Hi professor @jeff hanson why when we used slope tringles for T(DA) we didn't just considered this cable as 5 and went to calculate it with components?
When looking for the x-component of T[AB], we see that the x-axis lines up with cosine. So, when referring to our special triangle that is assigned to T[AB], we see that cosine (adjacent over hypotenuse) gives raito 3/5.
Thank You Dr. Hanson, these videos have been very helpful. I do have a question though, where do we get those little triangles from.....you know triangle 3,4,5 sides and the other triangles? Like am I suppose to be able to tell which triangles they are?
You can find them using the pythagorean theorem but the ones you’re talking about (3, 4, 5 or 5, 12, 13) are some of the common ones you’d find in problems (from what i’ve seen).
You derive them from SOH CAH TOA method. This is one of the method that is simplified if you don't want to use the angles method. But don't worry, either way, you'll get the same answers, you can get used to this method with enough practice
just isolate either Tab or Tad then plug it into the other equation that way the equation is in terms of one variable. Once u solve for that then plug that number into the equation to solve for the other variable.
Hello sir, In the free body diagram of point A why didn’t you negate 5/13 because in that quadrant the X component which is the 5 is negative. So something like -5/13(TAD). I’m just asking though???
T(AD) was in tension in second free body diagram but in third free body diagram in think the direction was opposite in reference to second fbd. Can we do that for all tension problems?
I thought force on both side of pulley is the same like in the other examples. Maybe this is just weight not a pulley. I am sorry I am new to this. Any help, please?
There's a system solver in your calculator, you can find tutorials online on how to do it on the specific calculator that you are using. What he means by enter is the equal sign on the calculator. You press equal to move on to input another number. Hope this helps
Idk if you were still wondering about this but the reason it is 5/13 for Tad is because the 5 side of the triangle lies in the X direction and the 12 side lies in the y direction (think of the triangle sides as ratios of the vector Tad in the X and Y direction). The negative sign on the 5/13 Tad comes from breaking up the vector Tad into its X and Y components (basically follow the x path and y path from the tail to the head of the vector to get the direction of the X and Y components). When this is done, you'll see the X component of vector Tad is parallel with the 5 side of the triangle. This should also help explain why we use 5/13 instead of 12/13. We see that the X component of that vector acts in the negative X direction, so the x component of the vector is -5/13 Tad. Hope that helps.
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why is this 10x more usful than any of my profs, this man alone is gonna save my statics grade
same.
Teachers who upload their own video instructions to the public are typically the teachers who actually truly enjoy teaching, and those people are gonna do their best to truly help their viewers, since they genuinely enjoy it. You can notice this very clearly in teachers like Jeff Hanson, Professor Leonard and Michel Van Biezen.
@@Peter_1986 agreed
@@Peter_1986 so true, tbh i want to upload educational videos on programming, math, or smth else because ik people who struggle with that and if i can help someone understand something they didnt before, that would be amazing
Because most profs are likely on an ego trip instead of being a servant!
Professor Hanson, Thank you for a solid analysis of 2D Statics on a Particle in mechanics, Drawing different types of Free Body Diagrams is very helpful.
Wooowwwww, you can really teach. Thank you so much. Everything looks clearer now. I have hope.
A lovely lesson. Thank you! ❤
thank you jeff you are the goat man
Thanks again. You explain things more fully than my instructor !
Cheers! all the way from the Philippines! thank doc!
This was a beautiful session. Wow. I am grateful. I have more understanding now.
Thank you Dr. Hanson
Hi professor @jeff hanson why when we used slope tringles for T(DA) we didn't just considered this cable as 5 and went to calculate it with components?
Good evening professor, thank you very kindly
😁😁😁a very big thank you soo soo much ,all the way from Uganda . You are a wonderful teacher
How did TAB x-axis turn to 3/5? Which mathematical inference is that?
When looking for the x-component of T[AB], we see that the x-axis lines up with cosine. So, when referring to our special triangle that is assigned to T[AB], we see that cosine (adjacent over hypotenuse) gives raito 3/5.
Incredible video once again!!
Thank You Dr. Hanson, these videos have been very helpful. I do have a question though, where do we get those little triangles from.....you know triangle 3,4,5 sides and the other triangles? Like am I suppose to be able to tell which triangles they are?
also wondering of this
You can find them using the pythagorean theorem but the ones you’re talking about (3, 4, 5 or 5, 12, 13) are some of the common ones you’d find in problems (from what i’ve seen).
You derive them from SOH CAH TOA method. This is one of the method that is simplified if you don't want to use the angles method. But don't worry, either way, you'll get the same answers, you can get used to this method with enough practice
You can also just use them to get the angles you need to get the x and y formulae. They worked for me fine, I got the same results as him
This helped a lot!
9:30 i have ti30xs i dont think i have system solver, how do you find the tension of Tab and Tad without using the calculator?
just isolate either Tab or Tad then plug it into the other equation that way the equation is in terms of one variable. Once u solve for that then plug that number into the equation to solve for the other variable.
How do you know whether to label, for example, TAD or TDA?? Does it make a difference?
No it doesn’t matter that’s the same thing.
Hello sir, In the free body diagram of point A why didn’t you negate 5/13 because in that quadrant the X component which is the 5 is negative. So something like -5/13(TAD). I’m just asking though???
T(AD) was in tension in second free body diagram but in third free body diagram in think the direction was opposite in reference to second fbd. Can we do that for all tension problems?
Why is Tad not equal to Tab? Shouldn't tension be constant in the cable?
TAB is a separate cable connected to the wall it can’t be constant.
Why is the tension only 100 for the first FBD if the weight is 200?
I thought force on both side of pulley is the same like in the other examples. Maybe this is just weight not a pulley. I am sorry I am new to this. Any help, please?
They are the same TADF
Anyone found (from a reputable source) Solutions to Hibbeler's Static text?
Thank you
great
I don't get how he gets the answers...how do u pluck in the digits; what does he mean by "Enter"...there's no "Enter" on my calci...
There's a system solver in your calculator, you can find tutorials online on how to do it on the specific calculator that you are using. What he means by enter is the equal sign on the calculator. You press equal to move on to input another number. Hope this helps
how do i use the system solver?
How To: TI36x-Pro - Solving 2 Equations, 2 Unknowns: ua-cam.com/video/o9h4DMC7YpY/v-deo.html&ab_channel=JeffHanson
We don't know that Tdc is parallel to the x axis, so the last free body diagram is wrong. "I think."
He told us it was at the beginning of the video.
should not be 5/13 instead of 12/13? sin=opp/hyp
Idk if you were still wondering about this but the reason it is 5/13 for Tad is because the 5 side of the triangle lies in the X direction and the 12 side lies in the y direction (think of the triangle sides as ratios of the vector Tad in the X and Y direction).
The negative sign on the 5/13 Tad comes from breaking up the vector Tad into its X and Y components (basically follow the x path and y path from the tail to the head of the vector to get the direction of the X and Y components). When this is done, you'll see the X component of vector Tad is parallel with the 5 side of the triangle. This should also help explain why we use 5/13 instead of 12/13.
We see that the X component of that vector acts in the negative X direction, so the x component of the vector is -5/13 Tad. Hope that helps.
it will depend based on where the angle is in the right triangle.
can i get a negative answer. please hurry
Yes, means you picked wrong direction on your free body diagram.
@@1234jhanson Thank you.
🤌🏼🍓
I got T(ab) as 48lb , did anyone get that too ?
Thank you
thank you