Variation of displacement `x` of a particle moving on a straight line with time `t` is shown in following figure. The figure indicates `:`

Options

A. the particle starts with a certain speed but the motion is retarded
B. the velocity of particle is constant throughout motion
C. the acceleration of the paticle is constant throughout motion
D. the particle starts with certain speed and moves with increasing speed.

Answer

A

Explanation

From the graph, we observe that slpe is non`-` zero positive at `t=0&` slpe is continuously decreasing with time and finally becomes zero. Hence we can say that the particle starts with a certain velocity, but the motion is retarded (decreasing velocity)