38 pM 16. 15 points 1 Previous Answers SAigTrig4 2.4.03 Two speed skaters, A and

Question

38 pM 16. 15 points 1 Previous Answers SAigTrig4 2.4.03 Two speed skaters, A and B, are racing in a 500-m event. The graph shows the distance they have traveled as a function of the time from the start of the race. Ask You d (m 500 100 010 r (s) (e) who won the race? O skater A O skater B (b) Find the average speed during the first 10 s for each skater skater A m/s skater Bm/s (c) Find the average speed during the last 15 s for each skater. (Round each answer to the nearest whole number) skater A skater B m/s m/s Need Help? Later

Explanation / Answer

a) skater b has won the race as he has travelled 500 miles in less time

b) avearge speed of skater A for first 10 s is

total distance travelled during 1st 10 seconds / total time

= 200/10 = 20 m/s

avearge speed of skater B is

100/10 = 10 m/s

c) avearge speed of skater A for last 15 seconds

= 100/15 = 7 m/ s

avearage speed of skater B for last 15 seconds

= ( 500 - 200 ) / 15 = 300 / 15 = 20 m/s

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