An object starts from rest and its velocity increases uniformly, reaching 20 m/s exactly 4 s after the start.
a. (a) Draw the velocity–time graph for the motion.
b. (b) Using the graph, calculate the displacement covered in the first 4 s.
c. (c) Using an appropriate kinematic equation, compute the displacement for the same time interval and show that your answer matches the value obtained in part (b).