Recent content by JukuJohannes

Homework Statement Hello, the question itself is pretty abstract. When pulling a thread roll, there is an critical angle, where the thread does not start to unwind itself. Instead, the thread roll itself starts to move. Derive an formula for determining that critical angle. Homework...

So depending on the properties of 'real material,' it would stretch until some point, until the force of inertia would overrun materials' flexibility, as the diameter of the rod decreases due the stretching, and then the rod would be torn apart?

Even in the case of idealized material?:rolleyes:

Hello! I am kinda confused in a thought experiment that my teacher gave me for thinking about. It is about circular motion. The question is that if you spin a rod and the point A, close to the center, is moving with a speed which is approaching to 'c', then what happens to the rest of the rod...

I think he means that all the information in the universe can be coded into bites, 0 & 1, based on this information, one can calculate the number of times universe splits, because one could predict all the events that occur in the universe. In this interpretation according to quantum theory- in...

yeah, that settles it down, I think I can see the big picture now, Thank You!

Of course the centripetal-acceleration but I thought that I should know the mass of the satellite to calculate the acceleration of gravity... btw.. thanks for the welcome

Homework Statement Earths´ satellite orbits 4200km above Earths surface. Count satellites´ trajectory circle-shaped and calculate satellites´period of revolution. The Attempt at a Solution I added the Earths´ radius to the 4200 km, which represents the orbiting attitude and then my mind...