Recent content by Lnewqban

I have represented the horse's center of mass with no rigor at all, since I don't know where exactly it may be. What I tried representing was that both independent and separate centers of masses (horse's and rider's) create a combined imaginary center of mass, which actually works as a unique CM...

Correct. Correct. Let's assume the horse-rider assembly shown in the attached diagram is in static balance while the horse is rearing (not falling forward or rearward for an instant). For that to happen, the horse-rider's combined center of mass must be located along the represented vertical...

Welcome! Place a big sponge inside the bottle.

Since you enjoy the capability of machining a recess in the top lumbar plate surface, why not to machine the two holes and two flat circular surfaces, respectively aligned with and perpendicular to the axes of the through bolts? Without weakening the lumbar plate much (5 mm max deep slanted...

Why did you call the washer "conical" in two occasions? I can't understand the concern of your supervisor. Unless I am missing something that is evident to him, I believe that the beveled washer can't affect the 10.23° interface angle between upper and lower torso. As correctly pointed above...

It sounds more like a mechanical restriction to me. If so, the problem should be more evident when the platform is closer to being vertical and less when it is closer to being horizontal.

Welcome! It could be any of the mentioned causes, plus some unusual resistance or friction in the mechanism of the lift. Does yours look like the one in the picture?

Welcome! You are showing us many photos of the same corner, but we will need to see different angles, in order to provide you with an answer. Also, it seems that you are calling beams the five 4x4 legs, for which you try to calculate maximum moment?

Could we compare your example to a bicycle wheel with its hub or bearings and natural axis of rotation not being perpendicular to the plane formed by the tire? If so, nothing changes respect to the original experiment: the thing will still rotate around a verical axis.

Could you please explain "the spindle of the top" a little more in detail? Which other way do you believe it could rotate and why?

Copied from: https://courses.lumenlearning.com/suny-osuniversityphysics/chapter/11-3-precession-of-a-gyroscope/

Welcome! Your attached diagram can't be seen for some reason. Try Control+P to insert the image, please. Regardless explanations or understandings, the phenomena is real. It happens to airplanes with big propellers and to electric hand grinders. There is resistance from any rotating body to...

I had a chance to see it in real time while I was driving Northbound 30 miles South of Cape Canaveral. Thank you for posting!

Are you describing the heating mode? If so, your wrapped-tube heat exchanger would be slightly increasing the temperature of the refrigerant entering the outdoor unit, reducing the amount of heat that unit can suck from the atmospheric conditions. That is assuming that the low thermal load of...