Gabriella weighs 450 n. she climbs a flight of stairs to a height of 3 m. it takes her 5 seconds. if she were to climb the flight of stairs again in the same amount of time, but this time while carrying two heavy books, how does the amount of work she does change from the first to the second trip up the stairs? a. the work increases. b. the work increases, and then decreases. c. the work decreases, and then increases. d. the work decreases.