Block A weighing 200 N is connected to another block B of weight W, by a cord passing over a rough fixed pulley. The weight W is slowly increased. Find its value for which motion just impends. Take...

Block A weighing 200 N is connected to another block B of weight W, by a cord passing over a rough fixed pulley. The weight W is slowly increased. Find its value for which motion just impends. Take coefficient of friction for all contacting surface = 0.2.