Question

In a 100-m race, the winner is timed at 10.8 s. The second-place finisher's time is 12.3 s. How far is the second-place finisher behind the winner when she crosses the finish line? Assume the velocity of each runner is constant throughout the race.

Separation = __ m

Answer 1

Answer: 1.70m

Explanation: SInce both are running a 100m race. this mean the first runner was going at a average speed of 100m/10.8s=9.26m/s

While the second average speed is 100m/12.3s=8.13m/s

find the difference between the average speed and time the multiply to find the answer.

8.13m/s-9.26m/s=x/(10.8s-12.3s)

x=-1.13m/s*-1.5s=1.70