Question

A group of runners complete a 26.2 mile marathon in 3.4 hours. The distance between the start and finish lines is 12.2 miles. What was the average velocity for the run?

Answer 1

26.2/3.4 would be the average velocity for the run.

7.7 miles/hr

Answer 2

Answer:

$\vec v = 3.6 mph$

Explanation:

As we know that the total path length of the Marathon is given as

$L = 26.2 miles$

while the straight distance between start and finish lines is given as

$d = 12.2 miles$

so here we can say that the displacement is the straight line distance between initial and final position which is 12.2 miles

so it is given as

$\vec d = 12.2 miles$

now the average velocity is defined as the ratio of displacement and time

$\vec v = \frac{\vec d}{time}$

$\vec v = \frac{12.2 miles}{3.4 hr}$

$\vec v = 3.6 mph$