Question

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

Answer 1

22.5 m/s^2

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.