I misread the question and so have rewritten my answer.
The surface will be an equipotential but to maintain it as an equipotential in an external field charges will have to move over...
At the moment of impact, this is the picture.
All vectors on body A are shown in a negative sense, and vectors on body B in a positive sense.
Conservation of momentum, linear and angular, is...
I think you are confusing the thrower with the observer.
In the left picture, the observer is in the middle of the carousel but not rotating with it. You can imagine that the observer is...
In an example problem from a book I'm using (David Morin's Introduction to Classical Mechanics with Problems and Solutions), there is a system with a person and a pulley on top of a platform....