Question: Starting from rest at the first floor, an elevator accelerates upward, reaching and maintaining a constant velocity until it reaches the 51st floor, when it begins to slow down and comes to a stop at the 53rd floor. The same man in the example is still in the elevator weighing the same fish, after measuring a weight of 50 N before entering the elevator. During what part(s) of the travel does the scale register a weight of less than 50 N?