what is the change in the velocity of the biker below as he travels from point b to point c ? ..... What is his acceleration from point b to point c ?

The change in the velocity = 4 m/s
Acceleration = 4 m/s²
Given
vo = initial velocity = 4 m/s
vf = final velocity = 8 m/s
t = 1 s
Required
The change in the velocity
Acceleration
Solution
the change in velocity =
[tex]\tt vf-vo=8-4=4~m/s[/tex]
Acceleration = ratio of a change in velocity and the time
[tex]\tt a=\dfrac{\Delta v}{t}= \dfrac{vf-vo}{t}[/tex]
Input the value :
[tex]\tt a=\dfrac{4~m/s}{1~s}=4~m/s^2[/tex]