An athlete is running on a circular track. He runs a distance of 400 m in 25 s before returning to his original position. What is his average speed and velocity?

Explanation

Total distance travelled = 400 m
Total displacement = 0, as he returns to his original position. Total time = 25 seconds.
Average speed = ?, Average velocity = ?
Average speed `=("Total distance covered")/("Total time taken")=(400)/(25) =16 m//s`
Average velocity `=("Total displacement")/("Total time taken")=(0)/(25) =0 m//s`