Gyroscopic Precession using a Bicycle Wheel

Physics Ninja looks at the precession of a bicycle wheel subjected to a torque from the force of gravity. The change in angular momentum results in a slow precession of the bicycle wheel around an axis of rotation.

[@mmo1239]

Chase the torque! This really helps me understanding how it works. Thanks ninja, like your chops a lot.

[@PhysicsNinja]

Happy to help!

[@paulgerard1201]

Finally! I found a perfect youtube channel to understand physics in depth 😭 I love you! ❤

[@ibissaa9695]

Really good video!! Thanks for an excellent demonstration and explanation!

[@saintless]

I feel stupid watching this... not because I fail to understand what you're talking about but because I doubt I could explain it as well as you do. Nice job! The "Ninja chop" was good for a laugh too... that earned a subscribe.

[@PhysicsNinja]

Thank you for subscribing. I’ll try to find ways to add more Ninja chops in future videos.

[@bharatwaasi393]

you win my heart

[@user-rj4cq3lj6d]

thanks for the video. By the way, It'll help a lot if you can explain why it precesses opposite way at the end of the video. Shouldn't the torque caused by the gravity still pointing towards the camera?

[@r2k314]

When you apply a force to the angular momentum vector, how is the R vector defined. It seems to be a different situation then an R vector from the point of rotation or axis of rotation used to compute the angular momentum vector? Thanks. Love your videos, and your passion for physics.

[@PhysicsNinja]

The vector R is needed to define the torque applied by a force. You first pick a pivot point, in this case a point that doesn't move is a good choice, where the rope ties onto the wheel axis. The vector R starts at that point and goes toward the point where a force is being applied. I have another video on gyroscopic motion which looks into the math of angular momentum in a little more detail.

[@r2k314]

@Physics Ninja 👍 But how about when you were holding the wheel with both hands and jerking it. How do you pick a pivot point when you don't know which way it is going to move. When the force is perpendicular to the angular velocity vector the length of R determines torque magnitude. There must be some objective way to determine R in that situation?

[@coryn7322]

Wow you explained it better than my Prof haha. I love your videos, keep it up :D

[@PhysicsNinja]

Thanks for the support. It's comments like yours that motivate me to make more videos.

[@vikramnagarjuna3549]

This is vikram from India,,, I love to listen this type of demonstrations.... EXCELLENT SIR...