Arope runs through a pulley 3.05 m off the ground. one end hangs straight down and is attached to a car's engine that is being hoisted. the other end is attached 0.61m off the ground to the rear bumper of another car. the car drives away at 4 km/h. how fast, in m/s, is the rope going through the pulley when the car's rear bumper is 4.88m from being under the pulley? the rope is long enough so that the engine is between the ground and the pulley.