Question

the velocity-time plot is shown in figure. Find the average speed in time interval t=0 to t=40 s during the period.

• A. zero
• B. $2.5m/s$
• C. $5m/s$
• D. none

Answer 1

The correct option is B $2.5m/s$

According to definition,

Average speed$=\frac{\text{Distance Covered}}{\text{Time taken}}$

Distance covered in $40sec=2\times 50=100$

Time taken$=40sec$

Average speed$=\frac{100}{40}=2.5m/s$

Option $\text{B}$ is the correct answer