Question

A motorcycle slows down from 40 m/s to 20 m/s. If this takes 4 seconds,

what is the motorcycle's acceleration?
A. -5 m/s2
B. -10 m/s2
C. 20 m/s2
D. 20 m/s2

Answer 1

a=v-u

t

a= 20-40

4

a= -20

4

a=-5

Answer 2

I believe the answer is A. -5 m/s2