Precession: Explaining the Linear Motion of a Spinning Wheel Probably an easy one So, I understand the idea of precession on a gyroscope: we've got the angular velocity vector, the angular momentum vector (same direction but times the inertia tensor), then a torque is applied => change in L in the direction of torque I'm thinking of the example
Direct vs. Retrograde Precession - Physics Forums If the body is flat, the precession is retrograde: the spin and precession rates have opposite signs (e g : a coin) If the body is elongated, the precession is direct: the spin and precession rates have the same signs (e g : an American football) My question is: why does this matter? (I understand why it happens)
Orbital Precession Calculation: Unit Explained - Physics Forums I just re read the section on precession and it also states that you can ignore the mass of the planet so there was no need for me to include ##M+m## The prediction using the formula above for the perihelion advance of Mercury actually matches observation which I think is due to the semi major axis being small and a high eccentricity, but for
How is the Precession of Mercurys Perihelion Calculated and Explained? Coordinate precession is apparent precession due to the Earth's own precession The coordinate system involved uses the Earth's vernal equininox as the reference point Since this shifts due to the Earth's precession, Mercury would appear to precess relative to this point even if it had no precession of its own
Understanding Gyroscopic Precession - Physics Forums but keep the same magnitude This is similar to a centripetal force keeping a car going around a circular road at constant speed If the precession angular speed Ω is defined to be the rate of change in the angle about the pivot with respect to time, this gives Ω = τ L End
Gyroscope precession - WHY? (Whats the cause?) - Physics Forums This piece of information clears my doubts and explains why the gyroscope makes de precession motion But why does the body tend to rotate around a line which is a principal axis of maximum moment of inertia?
The precession of Mercurys orbit - Physics Forums Then, I started reading about the precession of Mercury orbit "Mercury deviates from the precession predicted from these Newtonian effects This anomalous rate of precession of the perihelion of Mercury's orbit was first recognized in 1859 as a problem in celestial mechanics, by Urbain Le Verrier
Explaining Mercurys Precession: Layman Terms - Physics Forums Then Einstein, in his General Theory of Relativity, showed that the extra precession could be explained without an inner planet(in fact, the theory required the extra precession to exist), and the need for the planet Vulcan disappeared (At least until the mid 1960's, where it provided a home for Mr Spock)
Intuitive understanding of Thomas precession - Physics Forums The Thomas precession is a purely kinematic effect resulting from the non-commutativity of Lorentz boosts In Galilean relativity the generators of boosts all commute with one another but in special relativity the generators of boosts yield an overall rotation generator (about an axis orthogonal to the axes of the boosts)
Understanding the Relativity-Induced Precession of Mercurys Orbit Now, if we subtract Mercury's precession from the Earth's, we achieve the apparent precession of Mercury as seen from the Earth This is the number we want This gives us a difference of ΔP = 8 arcsec yr Or 80 arc secs per century Therefore we will see Mercury precess about 80 arc seconds per century, due to curvature of the field alone