Statics: Lesson 35 - 3D Equilibrium of a Rigid Body, 6 Equations
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- Опубликовано: 27 авг 2024
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When I'm doing this in pen and over halfway through the video you go "let's change things up, we don't need this anymore" or "I'm gunna undo this", I cry a little bit
the best explanation on rigid bodies in 3d so far !!!
Professor Hanson, thank you for a solid explanation of a 3D equilibrium of a Rigid Body.
this man obviously has a Phd in awesomeness
Many thanks to You, mr. Hanson. Stay healthy, greetings from Kiev!!!
A really great teacher and a cheerful person in general.
Thank you doctor!👍
Dr. Hanson, I've been watching your videos since Spring Semester 2020 right as COVID hit and the lessons helped a lot. I have to take the class again as my university did not allow that credit to transfer. I am no expert here but I want to point out that by 2:20 in this video you violated one of your most important principles in summing the moments. I paused the video as soon as the problem was legible and worked it all the way through. Upon resuming play I was pleased to see we chose the same x-axis, that brings me this much closer to being a legend in this business. However, you and I did not choose the same y-axis. I chose the far-long edge as that eliminated the 500# weight and wheels A and C. Thus giving me an immediate answer for the force on wheel B. I will finish the video now and see your results. I'm assuming your answers look something like A = purple, B = Magna Carta, C = 1492 CE.
Edit: After watching the video and looking through the comments I realized I put wheel A along the far edge, like a 4 wheel cart missing a wheel. Dr. Hanson, I stand corrected. You should stick to your day job of talking about Statics and let the Fine Arts people do their thing.
Shame on the one person that gave the dislike..
RIP
im writing in pen and when u changed the axis, i cried and then proceeded to redraw the entire thing
me 2
My prof has used the cross product to solve problems such as these but I am unable to find any videos or resources on that exact method
If the cart can't move through the x-direction, why isn't there a reaction on the x-direction on all three of the wheels?
That is a good observation. You’re correct in what you’re saying - The cart is constrained laterally in the x axis because wheels don’t usually allow sideways movement. The reason they aren’t included is probably because there’s no need to. There are no horizontal components in any of the applied forces - The forces simply act along the z axis. If there was, for example, an applied force to represent something pushing the cart from an angle, then yes, we’d be interested in forces acting in the x. Also, just to point out, not all of the wheels would have a reaction in the x, as at least one wheel would have to swivel in order to turn the cart. Good on you for seeing that though!
@@StuartZiane thanks for this...i have been having a headache thinking about this one
@@StuartZiane thanks a lot .....
@@StuartZiane another question. Don't we have to draw reaction moments on all of the wheels, since they can only rotate along two axes (swiveling and rolling)? We wouldn't have to do that if the wheels were spheres, I'm guessing, but here they are swiveling cylinders
@@karolakkolo123 i have the same question
You saved my life ty
Great video but it would help if you put Kevin MacLeod music in the background of your videos.
Love from Iran
could you also just find the equivalent force system of the known, than solve the rotation about the CB axis to get Az, then go from there?
For the moment about the new Y-axis, should it be 628.57(24) instead of 628.57(12)? Since we moved the y-axis over. I'm still learning so maybe I missed something.
The reaction Az will cause a counter clock moment about the y axis, since we measure the perpendicular distance away from the y axis. Az will be 12 inches away and not 24 inches away.
The wheel that has reaction for Az is in the middle. 12 inches away from the Y axis. The drawing can be a bit misleading
How is the Cz not causing a moment😢? "About the x axis"
The 24 should be a 27