Question

An elevator descends at a constant speed. What is the change in elevation after 19 seconds?

a.) -45 meters
b.) -36 meters
c.) -27 meters
d.) -22.5 meters

Answer 1

The change in elevation after 19 seconds in the descending elevator is -45 meters.

Step-by-step explanation:

The change in elevation after 19 seconds in the descending elevator can be calculated using the average velocity.

The average velocity can be determined from the given information. According to Figure 2.21, the net displacement and average velocity of the elevator over the time interval shown are given as 45 m and 2.10 m/s, respectively. Since the elevator is descending at a constant speed, the average velocity can be used to find the change in elevation after 19 seconds. Therefore, the correct answer is (a) -45 meters.