Respuesta :

jcherry99

Answer:

22.5 m/s^2

Step-by-step explanation:

Givens

vi=0

vf = 45 mph

t = 2 seconds

a = ??

Formula

a = (vf  -   vi)/t

a = (45 - 0)/2

a = 22.5 m/s^2 That's an incredible change of speed.