The document discusses several mechanisms that transform rotary motion into linear motion: - Rack and pinion uses a small cogwheel that engages with a toothed belt or bar to convert rotational motion into linear motion. - A winch consists of a crank handle connected to a cylindrical drum to wind or unwind rope or cable. - A nut and bolt mechanism uses a threaded bolt and mating nut that converts the rotational motion of the bolt into linear motion along its axis.