Question

HELP!

Freediving means diving without the aid of breathing equipment. Suppose that an athlete free dives to an elevation of -42 meters in 60 seconds. Find the average rate of change in the diver's elevation

Answer 1

- 0.7 m/s

Explanation:

Because we are talking about "elevation", we assume that going upwards will result in a positive elevation change and going downwards will result in a negative elevation change.

We also assume, since we are talking about free-diving, that he starts from the surface (i.e elevation 0 m) and he free dives to a distance of 42 meters downwards (i.e elevation of -42)

In our case, the change in elevation

= final elevation - intital elevation

= -42 - 0

= -42 m

time elapsed is given as 60 sec.

Hence rate of change of elevation

= change in elevation ÷ time elapsed

= -42 ÷60

= - 0.7 m/s