Question

How fast did the plane descend?

Choose 1 answer:
5 meters per second
B
6 meters per second
7 meters per second
D
4 meters per second
2 of 4
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Answer 1

Answer: 5 meters per second.

Explanation:

(A) It was at 8000m at 100 seconds.

(B) It was at 7000m at 300 seconds.

Difference in altitude = 8000m - 7000m = 1000m

Difference in time = 300s - 100s = 200s

`(1000m)/(200s) =5m/s`

Answer 2

5 meters per second

Explanation:

First you must find the slope of the graph. Take the rise/run of the function. The graph starts at 8500 meters and goes down to 7500 meters in 200 seconds. the difference between the change in meters is 1000 meters and the change in seconds is 200 seconds. That is 1000/200. This can be simplified to 5/1 which is 5 meters per second.