Which of the following graphs cannot possibly represent one dimensional motion of a particle?

Options

A. (i) and (ii)
B. (ii) and (iii)
C. (i), (ii) and (iii)
D. All four

Answer

D

Explanation

All the four graphs are impossible.
(i) A particle cannot have two different positions at the same time.
(ii) A particle cannot have velocity in opposite directions at thes same tiem.
(iii) Speed is always non-negaive.
(iv) The path length of a particle can never decrease with time.