Question

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

Answer 1

12.31 m/s

Step-by-step explanation:

If we recall from the previous knowledge we had about speed,

we will know that:

speed = distance/ time.

As such:

The average speed of the rider bicycle is

average speed = total distance/ total time

Mathematically, it can be computed as:

`v_(avg) = (d+d)/((d)/(v_1)+ (d)/(v_2))`

`v_(avg) = (2d)/((d)/(10 \ m/s)+ (d)/(16 \ m/s))`

`v_(avg) = (2)/((1)/(10 \ m/s)+ (1)/(16 \ m/s))`

`v_(avg) = (2)/((13)/(80 \ m/s))`

`\mathbf{v_(avg) =12.31 \ m/s}`