Physics Analysis if a Short Trip Activity Graph of Speed vs Time for the Short Trip Analysis of a short trip The graph shows how the speed of Liam's car changing during a short journey to the dairy. 1. There are 3 parts to Liam's journey. Describe the motion. a) Part A b) Part B c) Part C 2. Calculate the acceleration of the car during the first 20s. Show your working. 3. What is the acceleration of the car during the 20s to 40s time period? Explain your answer.