question_answer

Which of the following statements is correct?

i. Density is a scalar quantity.

ii. Momentum is a vector quantity.

iii. An object can never have zero displacement if it has moved through a distance.

iv. If an athletes completes one round of a circular track of diameter 200 m in 40 seconds, the distance covered by him at the end of 2 min 20 s will be 2200 m.

A) i and iii

B) ii and iii

C) i, ii and iv

D) only iii

E) None of these