Amass of 8kg is suspended from a spring with a spring constant of 16n/m and then released, creating periodic motion. at what distance below the natural length of the spring will the mass finally come to rest?

a. 4.9m
b. 9.8m
c. 19.6m
d. 7.2m

Brielle will run the marathon faster.

Brielle = 104.8 minutes  

Joshua = 157.2 minutes

Step-by-step explanation:

Speed rate = distance /time

Brielle = 1.25 /10 = 0.125 miles per minute

Joshua = 1.5/18 = 0.083333 =1/12 miles per minute

Since 0.125 (Brielle) > 1/12 (Joshua)

Brielle will run the marathon faster.

To calculate the time that takes each one to run the entire race (13.1 miles)

Time= distance / speed

Feel free to ask for more if needed or if you did not understand something.