A car passing the 1st tree with velocity u accelerates with a to reach the 2nd tree in time t at 2u. Then moves at constant speed 2u for 3t to 3th tree. Finally decelerates with a in 2t to stop at 4th tree. What is the total distance?
1. Region 1: x_1 = 1.5ut. 2. Region 2: x_2 = 6ut. 3. Region 3: x_3 = 2ut. 4. Total = 1.5 + 6 + 2 = 9.5ut.