The velocity-time plot for a particle moving on a straight line is shown in figure. Choose correct options .

Options

A. The particle has a constant acceleration
B. The particle has never turned around
C. The particle has zero displacement
D. The average speed in the interval 0 to 10 s is same as the average speed in the interval 10 s to 20 s

Answer

A, D

Explanation

Since the graph is a straight line, its slope is constant. It means acceleration of the particle is constant.Velocity of the particle changes from positive to negative at t = 10 s, so particle changes direction at this timeThe particle has zero displacement up to 20 s, but not for the entire motion.The average speed in the interval of 0 to 10 s is the same as the average speed in the interval of 10 s to 20 s because distance covered in both time intervals is same.