Question

9. Question : Cheryl runs a race on a circular 400.0 m track. She starts running east at the starting line and stops 20.0 m west of the starting line. Her time is 8.0 × 101 s. What is her average speed?

4.8 m/s

2.1 × 10-1 m/s

-2.5 × 10-1 m/s

5.0 × 101 m/s

11 years ago