If we have a hollow pipe sitting at rest filled with gas and we moved the pipe suddenly along its length to the right, then the gas density will be momentarily higher near the rear of the pipe and lower near its front because gas molecules have inertia. If we start rotating the pipe then gas molecules near the pipe wall will have maximum speed and the speed will go down as we approach the axis of the pipe.
What if this pipe was a long metallic cylinder. Metals have free electrons. Will the free electron density change in a similar way if we translate the cylinder suddenly?
What if we rotate the cylinder? how the free electrons will respond to that motion?
What if the metallic cylinder was charged (so now there is charge resides on its outer surface). How the charge on the surface of the cylinder respond to the sudden translation or rotation of the cylinder?
(And what theoretical model(s) one should consider to answer the previous questions?)