All Questions
Tagged with rotational-kinematics precession
10
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Which direction will the gymnastics tilt twist turn me? Figuring out rotation direction in torque-free precession
I'm trying to understand the physics of tilt twisting in gymnastics / trampolining, and I've run into a conundrum where theory doesn't seem to agree with practice, so I'm looking for where my mistake ...
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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 {...
3
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Kinematics of a rolling disk on a static disk (variation of the Euler disk)
I'm puzzled by the following problem. Consider a simple tilted disk $\mathcal{D}$ of radius 1 (in any unit) rolling without sliding on top of a static horizontal disk $\mathcal{S}$. The normal $\...
- 7,592
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Difference between nutation and polar motion
If you add a mass to your spinning globe or just change the mass distribution does it increase nutation or polar motion? And How do I calculate nutation? For this I take earth as an example. from what ...
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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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1
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Does Earth's precession rate change with the seasons?
As Earth's precession is caused by the differential solar, etc., attraction to its 'spare tire', then does the rate go to ~zero at the equinoxes and ~twice the average at the solstices? (preferred ...
- 21
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Gyroscope precession torque
We're probably all familiar with the demonstration of gyroscopic precession where a man sits on a swivel chair holding a bicycle wheel (like this: https://www.youtube.com/watch?v=1fWl2LNpcak).
And ...
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What is the difference between precession and axial tilt?
Am I right that the difference is that precession indicates the direction of the inclination of Earth's axis and the tilt is the quantity of this inclination? So that when there is no tilt there can't ...
- 3,348
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Motor-powered gyroscope's precession speed
I was doing experiment about the gyroscope's precession speed and I made my own gyroscope, which is the one in the picture. It is the motor-powered gyroscope as I found out the one made with bearing ...
- 37
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Proof derivative of a vector following precession motion
I do not get some points of this proof about the time derivative of a unit vector $\hat{u}$ (costant magnitude) which is following a precession motion. The picture is the following.
I want to prove ...
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