In a 5000 m race, the athletes run 12 1/2 laps; each lap is 400 m. kara runs the race at a constant pace and finishes in 17.9 min. hannah runs the race in a blistering 15.3 min, so fast that she actually passes kara during the race. how many laps has hannah run when she passes kara?

7 Laps

Explanation:

Velocity = Displacement / Time

Velocity of Kara

Velocity of Hannah

When Hannah will pass Kara they both would have run the same amount of time.

Displacement = Velocity × Time

Distance = Speed × Time

Distance traveled by Hannah

So, Hannah would have run 7 Laps when she passes Kara

less than one you can't create energy