Solution: 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 st

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/s^{2} 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.