Question : Which of the following graphs can not possibly represent one dimensional motion of a particle

(a) I and II
(b) II and III
(c) II and IV
(d) All the above
Answer : The right option is (d)
Solution :
I is not possible because total distance covered by a particle increases with time
II is not possible because at a particular time, position cannot have two values
III is not possible because at a particular time, velocity cannot have two values IV is not possible because speed can never be negative