Question

The graph of the x-coordinate of a particle going along the x-axis as a function of time is shown in the figure. The average velocity during 0 to 20 s is

• A. 30 m/s
• B. 10 m/s
• C. 2.5 m/s
• D. 0

Answer 1

The correct option is C 2.5 m/s

According to the graph given in the question:
Position of particle at $t_1=0s,x_1=0m$
Position of particle at $t_2=20s,x_2=50m$
$Averagevelocity=\frac{Displacement}{time}=\frac{x_2-x_1}{t_2-t_1}$
$\Rightarrow Averagevelocity=\frac{50-0}{20-0}=\frac{50}{20}=2.5m/s$
Hence, the correct answer is option (c).