| Time (s) | 0 | 1 | 2 | 3 | 4 |
|---|---|---|---|---|---|
| Displacement (m) | 0 | 5 | 10 | 15 | 20 |
(a) The displacement-time sketch for the car is shown below:
As we know,
Avg. velocity of car = Total\ distance \over Total\ Time
= 20 - 0 \over 4 - 0
= 20 \over 4
= 5 ms-1
Hence, the average velocity of the car is 5 ms-1.
(b) When we observe the graph, we can find the displacement of the car at various points,
At t = 2.5 s, displacement = 12.5 m and
At t = 4.5 s, displacement = 22.5 m
