The displacement-time graph is given below:
(i) When we observe the graph, we find —
Total distance travelled in interval 1 s to 5 s = 18 m – 6 m = 12 m
Hence, the total distance travelled in interval 1 s to 5 s = 12 m
(ii) As we know,
Avg. velocity = Total\ distance \over Total\ Time
= 18 - 6 \over 5 - 1
= 12 \over 4
= 3 ms-1
Hence, the average velocity of the car in interval 1 s to 5 s is 3 ms-1.