A construction worker pulls a five-meter plank up the side of abuilding under construction by means of a rope tied to one end ofthe plank (see figure). Assume the opposite end of the plankfollows a path perpendicular to the wall of the building and theworker pulls the rope at a rate of 0.18 meter per second. How fastis the end of the plank sliding along the ground when it is 1.5meters from the wall of the building? (Round your answer to twodecimal places.)
