Recent content by powerball

Actually i understand the second part, just not the rotational inertia bit

How does axis of rotation of a gyroscope alter from the geodetic and framedragging effects... and why is the axis pointing in a constant direction in the first place?

In GPB's experimental conditions, a negligible amount of precession takes place. So in terms of rotational inertia, why does the spin axis of a gyroscopes remain pointing in the same direction? Also, why would changes in space-time cause the axis to change? Thanks

can you combine an equation with linear and angular momentum or do you have to do it independently? e.g in the case of a flow of water causing a ball to roll

If 2 molecules collide, m1u1+m2u2 = m1v1+m2v2. However let's say the object hit rolls. How would that factor be dealt with in terms of momentum

Thanks very much i can integrate from there. Just wondering in a vortex is the speed of the water rotating the same at any depth in the vortex?

if you could guide me on the differentiation needed to work out the shape of the surface that would be helpful

can anyone answer this instead? why is there greater centripetal force at the bottom of the beaker than the top

Here are a selection of questions in the practice oxford written test. I still do not understand the mechanism to work out the answers to this type of question. Can anyone help me out? which is the odd word out and why? a) gun, boy, pay, rob, sin, new b)mail, dine, annoy, asset, sinned...

hmm can i assume that the rotation energy + kinetic energy of the ball is equal to the kinetic energy of the water?

Actually that was dumb i can work out the force needed to roll the ball. The problem is just how to translate that into the angular momentum of the water

Iam having some trouble understanding the nature of free vortexs, with the internet and library being extremely scarce in answers. My understanding is that the angular momentum of the water causes a centripetal force to push the water outwards leaving a cavity in the middle. I understand that at...

The experiment consists of a magnetic stirrer and a marble in a beaker of water. When the magnetic stirrer is turned on a vortex is formed and the marble rolls along the edge of the beaker. If the speed of the marble is known, is it possible to work out the force required to roll the marble at a...