Recent content by lowbattery

Hello. I come across a problem: how to calculate the partition function of a classical spring whose energy is 1/2kx^2, and use thermodynamics to show that the force on the spring is linearly proportional to its elongation x? I got stuck at the first step. What is the energy of the spring, is...

Thanks a lot! By the way, a is the radius of the rolling ball which I forgot to mention.

Hey there. I have a problem about rolling ball and it's from my homework. 1. Homework Statement A ball rolls down the surface of a rough fixed sphere of radius r, starting rest at the top. What's its speed when the line between the two centres makes an angle alpha with the upward...