Question

The following table gives the displacement of a car at different instants of time.  

Time (s)	0	1	2	3	4
Displacement (m)	0	5	10	15	20

1. Draw the displacement-time sketch and find the average velocity of the car.
2. What will be the displacement of the car at (i) 2.5 s and (ii) 4.5 s?

Answer 1

a.

Displacement-time graph

From the part AB of the graph,

Average velocity = `("Displacement at B - Displacement at A")/"Time taken"`

 = `((30 - 20) m)/((6 - 4) s)`

 = `(10/2)` m/s

 = 5 m/s

(b)

1. From the graph, the displacement of car at 2.5 s is 12.5 m.
2. From the graph, the displacement of car at 4.5 s is 22.5 m.