Question

A body is moving in a straight line and its displacement at various instants of time is given in the following table :

Time (s)	0	1	2	3	4	5	6	7
Displacement (m)	2	6	12	12	12	18	22	24

Plot the displacement-time graph and calculate the average velocity in time interval 1 s to 5 s.

• A. $3.2m{s}^{-1}$
• B. $3.6m{s}^{-1}$
• C. $0m{s}^{-1}$
• D. $3m{s}^{-1}$

Answer 1

The correct option is D $3m{s}^{-1}$

$AverageSpeed=\frac{\text{Distance travelled}}{\text{Time interval}}=\frac{12m}{(5-1)s}=3m/s$