Question

A gazelle can change its speed from 0 to 45 mph in 2 seconds. What is the gazelle's acceleration?

Answer 1

Answer:

average acceleration a=change in velocity / time it took to get to velocity  

a=(45-0)mph / 2s = 22.5 mph/hr/s

Step-by-step explanation:

Answer 2

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.