Question

The figure shows the velocity $(v)$ of a particle moving on a straight line plotted against time $(t)$.

• A. The particle has zero displacement
• B. The particle has never turned around
• C. The particle has constant acceleration
• D. The average speed in the interval 0 to $5s$ is the same as the average speed in the interval 5 to $10s$

Answer 1

Answer: (C), (D)

The displacement is the area which the velocity-time graphs encloses with time axis for a given interval of time. Since the area of velocity-time graph for time $0$ to $5s$ is the same as area of the velocity-time graph for time $5s$ to $10s$, hence average speed in these intervals is the same.