classical mechanics - Why do bullets precess in the opposite …
2023年4月21日 · The gyroscopic precession through spin stabilization is utilized specifically to maintain this orientation, and is why bullets weather-vane. Spin stabilization is quantified by the gyroscopic stability factor, SG, and by definition inadequate spin reverses the orientation of COP and COG and is an SG < 1 .
What determines the direction of precession of a gyroscope?
A foo-hand rule is used to assign a direction of vector of angular momentum, and then the same foo-hand rule is applied in the rule for finding the direction of gyroscopic precession. As in all physics: as long as applied consistently throughout right-hand-rule and left-hand-rule are interexchangable; the foo-hand rule is not in any way a ...
Derivation of gyroscopic precession equation: Why is
2020年5月24日 · Incidentally, note that the description of gyroscopic precession in the source that you linked to is (like most sources) not complete. "The top precesses around a vertical axis, since the torque is always horizontal and perpendicular to L.
Can someone please explain Gyroscopic precession?
2020年5月22日 · It is more logical to explain torque for layman. Now come to gyroscopic motion in the video. A wheel is rotating with speed, it has angular momentum in horizontal direction. But it weight is pulling downward its centre due to gravity, which is prevented by support.
Why does pitch in a helicopter take effect 90 degrees later?
It says that if the helicopter wants to pitch forward, it changes the angle of the blades 90 degrees before. And gyroscopic precession takes place. But it also says that the effect takes place 90 degrees later. That I do not understand. The effect should take place immediately.
Resisting Precession of a Gyroscope - Physics Stack Exchange
2022年6月11日 · That is: the applied torque causes a motion, and the gyroscopic effect occurs in response to that motion. As discussed in the linked answer: the pitching motion itself causes the gyro wheel to exert a torque. The magnitude of that responsive torque is proportional to the rate of gyroscopic precession. As to what that means for engineering a device:
Gyroscope precession: angular momentum and torque
2021年6月15日 · The tip of the angular momentum vector, L L →, (and the axis of the top) moves around the circle shown dashed and labelled ωp. It is the torque τ τ → that gives rise to the precession. That is, it gives rise to the rotation of the axis L L → (as in your diagram) about the z-axis. Torque is directly proportional to the timed rate of ...
What causes precession or nutation in a spinning object?
You get gyroscopic precession when a torque is exerted. That torque causes change of angular momentum. Still, stable gyroscopic precession is cyclic, so something is conserved there. The direction of the angular momentum is changing all the time; the thing that remains the same is the magnitude of the angular momentum.
Gyroscopic precession - Angular momentum in vertical direction
2018年7月31日 · In the classic example of gyroscopic precession, the wheel starts to process, and now acquires a angular moment also in the vertical direction. Initial angular momentum was in a single plane. The one due to the spin, and the one due to self-weight). How is this new vertical angular momentum induced mechanically?
newtonian mechanics - Can you explain gyroscopic precession …
2020年5月17日 · "Intuitive" is a tricky word. Most people find gyroscopic effects unintuitive no matter what we do. And by far the most intuitive way to understand gyroscopic effects is through angular momentum conversion. That reduces these effects to a handful of straight forward equations. Fundamentally the motion of gyroscopes is based on momentum.