4 The approximate velocity-time graph for a car on a 5-hour journey is shown in Figure 3.8. (There is a very quick driver
change midway to prevent driving fatiguel)
a State in which of the regions OA, AB, BC, CD, DE the
car is (i) accelerating, (ii) decelerating, (iii) travelling
with uniform velocity
b Calculate the value of the acceleration, deceleration or
constant velocity in each region.
c What is the distance travelled over each region?
d What is the total distance travelled?
e Calculate the average velocity for the whole journey.
C D
100
А
B
80
speed/kmh)
60
40
20
o
E
o
0
4
5
2 3
time/hours