For anyone still not understanding - I watched the video by Physics Videos by Eugene Kutoryansky and it all made sense. Think about a Beyblade or Dreidel, or some other spin top toy, the faster you spin the thing, the more it wants to stay upright, and the less it is affected by gravity trying to pull it down, simple enough right? Now apply the same concept to the spinning bike wheel demo. If spun fast enough, the angular momentum will overpower the torquing force of gravity, until it slows down to the point that gravity overpowers the angular momentum. Hope that helps anyone who might still be confused
This right and rule thing is confusing me, in the bike wheel example if it was spinning the opposite way it's not like the angular momentum is going to be pointing the opposite way as shown. That doesn't make sense
Just like how Earth's satellites do not fall onto Earth, because gravity is entirely used for the centripetal force of satellites. A rotating wheel will not fall down. Because all the torque is used for the wheel's Precession.
Nice descriptive video. BUT I'd like to point out that with it, we only have a tool (right-hand-rule) to describe and predict the movement. It doesn't explain the physics at all and anyone, who thinks to understand now, is mislead. So, sorry to disappoint all the euphoric viewers: you/we still have no clue. 😂
You achieve "rigidity in space" to have your own x,y,z as much as possible for very practical reasons. Some kind of missing data for flying or general engineering in the past. We have a human sense of it built in, but machines didn't. A computer need an analogue or digital reading from somewhere to do something in that regard. It's quite funny how we reinvent "a body" and such for machine constructs. Well, you will want to fly or something in a safe way. When the air plane is upside, down it's good to know, even for a silly part we don't care about and it got computerized to not forget it. The computer then got what it needed. Now the pilot can also see the info in a fancy way, which is more precise than before.
The thumb trick is quite nice and easy to represent. I took physics freshman year of high school and didn’t have the prerequisites of trig so I didn’t understand half of what was taught. It might be nice to have explained some of the basic terms. It took some time for me to understand why the torque force was perpendicular to the rotating force applied to the wheel. Once that was more clear the example/tests in the video were much easier to visualize and play along with.
Omg I had so many eureka moments thanks to YOU! Thank you so so so so so much! I'm so glad someone in my past cared enough to heal my stupidity in their future :> May your videos reach millions of views as you are worth it. <3
No doubt best explanation. But for me now the main question what is angular momentum on material level, not on the math one? Why rotated object wants to save it's momentum?
This is actually a bad video (sorry). Work done in vain because torque and angular momentum appear out of the woods and solve everything with the gyroscope (the right hand rule magic). This is not an intuitive ('easier than I might think') explanation. Actually even college books for physics majors (Kleppner/Kolenkow, Ohanian, Young/Freedman) and Walter Lewin fail badly with the gyroscope. A better video is this ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-n5bKzBZ7XuM.html A proper way to explain the motion of the gyroscope, that is its orbital motion and why it does not fall down while spinning, would be something like to divide a spinning disk into infinitesimal units of volume (mass). Each of these units will have a different linear momentum vector. Each unit (all combined into a rigid body) will experience the effects of the normal force on the pivot, gravity on the center of mass and the centripetal force of the axle. Then I expect there might be a way to paint regions of the spinning disk with different colors to show the effect of these forces on rotation. I expect some day a hero will make such video on RU-vid.
Thanks. Great approach. The purely qualitative approach eliminates the serious confusion most learners and teachers suffer. If I may add, it should be emphasized that the torque of a spinning wheels has a different direction from that of a non-spinning wheel. And for disclosure, I never understood it intuitively despite teaching it many times.
Definitely one of the best videos made on this topic . I tried self studying this topic and understood it about 70% . Mainly i wasnt able to build intuition for it , but this video helped a ton . Thanks
It's a feedback loop. Further: the momentum's direction is changed by a force that brings it back to zero, thus conserving space thus increasing the rotation or causing the object to rotate on an axis other than the one causing the monentum in the first place, the inertia keeping it going until something else acts on it friction etc. So there are actually three rotations going on at once on three different axes all at right angles to each other ideally. This proven by the state of the wheel relative to the rope when the angular momentum stops. The momentum of the wheel spinning must act as a counterbalance to the force of gravity on the weight of the wheel itself, until it is over come by a different inertia as stated early. Note: it would be better to give torque representation in two D space rather than just arrows as it is a streach to understand the direction with the Rule without having to make a mental fill in that someone who is really young might not be able to do(I know I wouldn't have and only did it with a bit of reflection now).