Question

A bicycle racer rides from a starting point to a turnaround marker at 10 m/s. She then rides the same route from the turnaround marker to the starting point at 16 m/s. (a) What is her average speed for the whole race? (b) What is her average velocity?

Answer 1

12,3 m/s speed ; 0 m/s velocity

Explanation:

it would seem that the speed is 13 m/s but it isn't true because the speed is referred to the occurred time. IT is non given the distance travelled, than i suppose 160 m in first direction and the same in the other one. The times occurred are16 s and 10 s for a total of 26 s to travel 320 m. `v= s/t= (320m)/(26s) =12,3 m/s` sthis is the speed a scalar quantity that refers to "how fast an object is moving." Tha velocity is a vectorial quantity that refers to "the rate at which an object changes its position." This value is zero because the rider is come back to the start point

Answer 2

see below

Explanation:

I supposed a distance of 160 m because so the calculation were easier, but you can suppose any other distance. The average speed does not depends on the distance