A car starts from rest at a red light at t = 0 and accelerates at 2 m/s 2 for 10 s, then travels at constant speed for 10 s, accelerates (decelerates) at -1 m/s2 until it reaches zero velocity and stops.
[a] Plot the velocity of the car versus time from t = 0 s until it stops.
[b] Find the average acceleration between t = 0 and t = 20 s.
[c] Find the displacement of the car from start to stop.
[d] Find the average velocity of the car for the entire trip from start to stop.