How fast did he go?

Question

Tom goes from 0 to 15 meters in 5 seconds.  At what rate (meters per second) does he run?

Answer 1

distance = rate*time, so distance/time = rate

 

distance = 15 m, time = 5 sec.

 

15 m/5 sec = 3 m/s

Answer 2

3m/s is the correct for the average speed which is derived from the formula (Vf-Vi)/t or dV/dt