All Questions
Tagged with gyroscopes precession
88 questions
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What are "interaction particles" that cause gyroscope precession?
To move or rotate any object, we need some force, this force can interact with object in different ways, contact force(electromagnetic force between atoms), magnetic force etc. All these forces have ...
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Suited change of basis coordinates for solving relativistic Lense-Thirring and frame dragging
I have not been able to find in textbook (Landau, Wald) the rationales driving to the coordinate basis change proposed in MTW in order to comprehend the Lense Thirring / frame dragging effect in an ...
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2
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79
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How to understand gyroscopes by using vectors?
I’ve seen plenty of videos explaining how gyroscopes work, but almost non of them why they are constrained to work in such way. From seeing only angular momentum vectors, how could one predict ...
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3
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What happens if we prevent gyroscope to precess?
If we apply some torque to spinning wheel in a vacuumed space in body frame y axis, wheel try to precess due to gyroscopic effect but it will be prevented by obstacles as seen from picture,
what will ...
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When looking at Gyroscopes, does precession only occur if a force is applied perpendicular to the axis of rotation? or can it be a parallel force?
I am trying to simplify gyroscopic precession for PPL Helicopter students and in the process confused myself. Many texts define it as processing a force 90 degrees when the force is applied 'parallel ...
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Choice of axis in analysis of gyroscopic precession
In many demonstrations of analysis of gyroscopic precession, the analysis goes on by choosing two axes, one about which angular momentum is calculated, another about which torque of gravity is ...
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Why does the period of precession of a gyroscope have to be way larger than it's spin period so that it's motion can be modelled?
Mathematically, torque induced gyroscopic precession may be modelled with the following equation:
$$
{\displaystyle T_{\mathrm {p} }={\frac {4\pi ^{2}I_{\mathrm {s} }}{\ mgrT_{\mathrm {s} }}}={\frac {...
4
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Spinning Wheel subjected to Gravitational Force
have a question about the dynamics of a suspended horizontally rotating wheel subjected to gravitational force like in following picture I took from here:
At the beginning the wheel has an angular ...
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4
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Why do bullets precess in the opposite direction from gyroscope diagrams?
Bullet spin causes a bullet to become a gyroscope. Specifically, bullets have their center of pressure in front of their center of mass. Therefore, when pressed, gyroscopic forces cause a bullet to ...
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Is Energy conserved in a spinning top?
When we spin a top (give it kinetic energy $K_0$) and place it on a table, it starts precessing around the vertical axis.
Is the total energy of the spinning and precessing top equal to the initial ...
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Pencil doesn't act as a spinning top
If one spins a spinning top, it'll stay up for a while before falling down. However, if one spins a pencil, it falls down immediately, just like if you didn't spin it at all. My question is why there ...
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Gyroscopic bicycle wheel - forces on the wheel only
This is a standard problem in university physics, which I studied at university in depth. With higher concepts like angular momentum, it is fairly straightforward to explain the motion.
However, one ...
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Why is precession angular velocity of a gyroscope independent of the angle of its axis?
I'm making gyroscopes in my shop and studying precession. Studied dynamics in 1964 so may have forgotten a thing or two.
Consider a gyroscope or top spinning with its axis at angle $\beta$ with ...
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Geodetic Precession of a Gyroscope in Hartle's GR Book
In 14.3, Hartle deduces the geodetic precession angle per orbit of a gyroscope in Schwarzschild geometry. Immediately after eq.(14.18), the book reasons that the angle deduced is physically measured ...
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How can precession produce a torque in the direction of precession when it has no angular momentum?
Updated question, also includes somewhat of an answer.
To clarify the point about precession having no angular momentum, if the torque that induces precession is suddenly removed, the gyro suddenly ...
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Is it possible to change the speed at which a wheel is freely spinning by moving only its axle?
Suppose we have a wheel spinning on a perfectly lubricated axle. Is it possible to change its angular velocity about that axle, by moving only the axle?
Due to the wheel's symmetry about the axle's ...
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Will the inner gimbal continue to rotate if no friction?
The picture shows a gyroscope with a rotating disk.
Adding a force to the outer gimbal from a certain direction causes the inner gimbal (plus the disk with bearings) to rotate as well. When the force ...
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Resisting Precession of a Gyroscope
its known that if a torque is applied to a spinning gyro, the gyro will pitch. There's a lot physics on the pitch speed, but what is the torque to induce this pitching?
ps. I am building a gyro ...
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Definition of rotation moment in a vertical surface during forced precession of a gyroscope
I have the following assumption:
Moment of gyroscope flywheel created by gravity force:
Rotation moment of natural precession due to gravity forces:
Since the flywheel does not drop:
However, when ...
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2
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641
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Antigravity force in powered precession gyroscope [closed]
I have an idea that a powered for rotation gyroscope with fixed precession can serve as antigravity engine. I also wonder of someone tried an experiment to prove that it does not work.
The following ...
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Does motorcycle counter-steering work by precessional motion?
When a motorcycle is going over a particular speed ($\approx 20$ m/h or 30 km/h) you learn in motorcycle class the best way to steer is using the so-called "counter steering";
I can't find ...
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Gyroscopes and Conservation of Angular Momentum follow-up
I'd like to follow up on a question I asked two years ago under the same title (Sept. 22, 2019).
I am trying to understand just exactly how angular momentum around the vertical axis is conserved ...
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Why does a rotating mass generate a torque on an attached object?
In this video, we see a little toy vehicle with two wheels that is unstable by itself. However, when an attached gyroscope is running (a rotating mass) it stabilizes itself.
When the mass starts to ...
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Why does a precessing wheel remain horizontal, instead of flipping?
Suppose I have a wheel with an axle, such that one side of the axle is tied to a rope. I'm initially holding wheel in such a way, that the radius vectors of the wheel are perpendicular to a board. I ...
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Intuitive derivation for the precession rate of a spinning wheel
The derivation of the precession rate of a wheel hanging from a rope, as shown below usually involves taking
the total torque acting on the system and equating it to the change in angular momentum.
...
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167
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Derivation of precession rate of a wheel gyroscope [closed]
I searched on the web and all I could find is the precession rate of a spinning top. But what I want is the derivation of the precession rate of a wheel hanging from a rope, as shown below:
which is ...
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276
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Why does the gyroscope oscillate a little when it just starts to precess?
I was reading up on why before starting the precession the gyroscope "goes down a little", (Link at the bottom). In this paper, while looking at the graphs I observed that before reaching ...
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814
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Centripetal force in a gyroscope
I realize there is another question on the centripetal force involved in a gyroscope's motion, but I found the answer to not be very complete.
With respect to a gyroscope attached to a vertical spring ...
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Precessional motion of a spinning top
In Feynman's book, when he talks about the motion of a rapidly spinning top, he mentions:
"When we apply a Torque to a rapidly spinning top, the direction of the precessional motion is in the ...
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Conceptual Question About Gyroscopic Precession of body about Two Axes
I've been trying to glean some insight into the motion of a body that is rotating about an axis through the COM of said body whilst traveling in a orbital-like path about a perpendicular axis outside ...
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Calculate total angular momentum of precessing and spinning wheel, then use result to prove gyroscopic precession formula
Consider the following scenario: https://youtu.be/8H98BgRzpOM?t=27.
How would I calculate the total angular momentum of this system? The spinning wheel is rather easy, and it's $L_{\rm wheel}=I\omega$....
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Is the torque on a gyroscope a conventional virtual force perpendicular to rotation?
So I am having some difficulty understanding gyroscopic precession. I understand that mathematically by convention torque is perpendicular to the force and so is angular momentum but surely that force ...
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360
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Rotational mechanics in a gyroscope question
I have a homework question about gyroscope rotation, but I will describe my confusion more specifically as follows:
Below is the setup of the problem. I understand the concept that if the rotor is ...
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Anti-gravity wheel?
So I was just watching some YouTube videos on a spinning wheel that seemed to "defy" gravity. The creator made two videos on it, the first showing the wheel, and the second with an attempt ...
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Precession of Angular momentum of Symmetric Top
For a torque free symmetric top, is the angular momentum in body fixed coordinates in same direction as instantaneous axis of rotation?
I know that instantaneous axis of rotation precesses about ...
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Will a rotating rigid disk precess in microgravity?
Given a wheel like a disk with some angular velocity $\omega$, will it precess in microgravity?
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Gyroscopic forces due to counter rotating electric motors [closed]
I am currently working on a tilt rotor aircraft, for that I need to size a motor the applies the torque to swivel the propellers from a down facing position into a rear facing position. We are using ...
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4
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493
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Can someone please explain Gyroscopic precession?
So I watched this video
It is a fairly popular one by veritasium, and one that confused me. I was wondering if someone can cover the physics behind this in a intutitive and easy to understand manner. ...
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Can you explain gyroscopic precession using only Newton's three linear laws without applying their angular cousins?
Is there an intuitive approach to understand gyroscopic motion based on Newton's laws without passing through angular momentum conservation?
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The acceleration of gyroscopic precession
If we take the movement of a rotating gyroscope held horizontally at one end with a rope, then the rotational momentum of the gyroscope's spin exists, as well as the rotational momentum caused by ...
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Lagrangian of a precessing wheel: gyroscope in Lagrangian mechanics?
Let's consider this classical example:
I would write the Lagrangian as the one of the spherical pendulum plus the rotational energy of the wheel, but I fail to see how the precession motion would ...
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Dual gyro system: will it resist a turning force?
Let's say there are 2 gyroscopes. Both are connected to the same frame (orange). Both are spinning at the same speed, but in opposite directions (red).
If I spin the frame (green arrow), the gyros ...
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Why does the axis of spinning tops rotate about a vertical axis?
I have noticed that when we make a top spin, the top itself rotates about it's own axis and at the same time its axis of rotation will be moving in circles. How to explain this? Why can't it simply ...
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Rotational Work-Energy Theorem and uniform precession of a gyroscope
For a gyroscope in uniform precession, what would happen if we suddenly turn off gravity? Will it stop precessing because there is no torque and so there is nothing causing the direction of the ...
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Will a double gyroscope provide net upward force when rotated?
I watched this video on double gyroscope
Precession: https://m.youtube.com/watch?v=vGun5athdfg
When the two gyroscopes are spinning in the same direction, the apparatus can be rotated and the arms ...
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Feynman Lectures: 20–3 The gyroscope
In the The Feynman Lectures on Physics, Volume I, Chapter 20, Section 3,The Gyroscope found here, Feynman wrote
We note that when the wheel is precessing, the particles that are going around the ...
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Which way does a symmetric top precess and why?
I'm calculating the (instantaneous) rate of precession of a symmetric top (i.e. $I_1=I_2\neq I_3$) that is tilted at angle $\theta$ to the vertical if a torque $\vec{G}$ is applied, as shown below:
...
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Does the angular velocity of a wheel affect its height in this situation?
If there were no friction at all, and the wheel was spinning with some angular velocity in the initial picture shown below. Would the wheel stay perpendicular to the ground regardless of the angular ...
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Gyroscope precession and Euler equations
I've been trying for so long to solve this problem, but the solution I have found isn't the one I expected. Basically, I have to solve Euler's equations for a gyroscope with a weigth at a distance d. ...
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Why can a gyroscope go upright for a while, after losing some energy?
There are many questions about gyroscopes, and this one: (Confusion about what happens when the rotating axis of a gyroscope is rotated) remind me of an odd behaviour of a toy gyroscope that I had.
...
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