Recent content by Crusader711

Rolling verses Frictionless Would we treat the spheres differently? thin-walled sphere rolling... ...then solid sphere with liquid, liquid sphere moving down incline (not rolling), but we have to account for the ICM of the thin-walled shell too? Any thoughts?

A hollow, thin-walled sphere (ICM = 2MR2/3) of mass 20 kg is completely filled with a liquid of unknown mass. The sphere is released at the top of a plane inclined at 30° to the horizontal, and it rolls 20 m to the bottom in 3.6 s. What is the mass of the liquid? 2.My approach is...

Awesome...so I'm looking at approx 74.728J/76.809J= 0.9729 which is my loss in Kinetic Energy. That wasn't too bad I suppose for a University Physics course student :-) Thanks "voko"...I do appreciate the guidance.

The final KEf should be 1/2(m1+m2)v2^2, which we would subtract from the initial KEi= 1/2m1v1^2, then divide by the KEi?

1. This was a hard test question that I took partial credit on. I want to fully understand what I did wrong so that I’m fluid with the concept. I’m also new to this forum. I love constructive criticism too! lol Zombie Apocalypse has arrived and the war has begun. Your task as a physics student...