The acceleration of a car that increases it's velocity from 0 to 100 m/s in 20 seconds is...?

Question

This is a question on my homework, but I can't find the answer in my textbook, please help!

OPTIONS:
A. 5 m/s
B. 5 m/s^2
C. 10 m/s^2
D. 20 m/s^2
E. 20 m/s

Answer 1

Initial velocity,u=0 m/s

Final velocity,v=100 m/s

Increased velocity,Δv=v-u=100 m/s

Time intreval,Δt=20 s

Acceleration,a=Δv/Δt

                    =100/20

                    = 5 m/s^2

Option B is correct