Physics Archive: Questions from 2024-11-14

The blocks shown are connected by an inextensible cable. The coefficient of friction between the 10−lb block(A) and the floor is 0.6. If the blocks are released from rest when the spring is stretched 15 inches, find: a) maximum velocity of the blocks, b) stretch in the spring at maximum velocity. Block B weighs 2-lb. Box in your answers

Consider a contour consisting of two semicircular parts with radii a and b, and two linear parts, each of length b−a. This contour carries a charge Q that is uniformly distributed along its length. Find the electric field at the center of the contour in terms of the given quantities.