Question Regarding Velocity-Time Graphs

[Drewski]

Homework Statement

The figure below shows the velocity-time graph of a train that starts from the origin at t = 0s

a) Draw a position-time graph and an acceleration-time graph for the train

b) Find the acceleration of the train at t = 3.0 s

Homework Equations

a = Vf - Vi / t

x = 1/2 at^2 + Vi x t + Xi

The Attempt at a Solution

a)

b) 1 m/s^2

Do my answers look right? If not, what did I do wrong?

 

[ehild]

The acceleration is correct, and the graph of x(t) is almost correct, only the part between 0 and 4 s does not look parabolic, and check x at t=2 s. ehild

 

[AJKing]

Looks right to me. But those are really, really, truly, bad graphs.