What is the average velocity of the particle from rest to 15 seconds? A. 1.1 meters/second B. 1.2 meters/second C. 1.3 meters/second D. 1.4 meters/second

D. 1.4 meters/second

Explanation:

To calculate average Velocity, the proportion of the total Displacement or distance traveled to the total time taken during that Displacement is calculated.

Total Displacement from rest(that is 0) to 15 seconds (21, on the graph)

(0, 21)

Total time taken = 15 seconds

Average Velocity = (total Displacement / total time taken)

Average Velocity = (21 - 0) / (15 - 0)

Average Velocity = 21 / 15

Average Velocity = 1.4 meters per second

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min