Q.17:- Figure 3.21 shows the x-t plot of one-dimensional motion of a particle. Is it correct to say from the graph that the particle moves in a straight line for t < 0 and on a parabolic path for t > 0? If not, suggest a suitable physical context for this graph.
No, because the x-t graph does not represent the trajectory of the path followed by a particles. From the graph, it is noted that at t=0, x=0.