A runner can run a 400.0 meter lap in 50.0 seconds.   He finishes at the same spot as he began.  What is his average velocity?

Respuesta :

8 meters per second. To find velocity is to divide distance by total time. so 400/50.
velocity: displacement/time 
as he's back at the same spot, displacement=0
0/50= 0 
hope this helps!