question_answer

A player takes a complete round in path of radius R in 40 s. After 2 min 20 s, its displacement will be                

A)  zero              

B)  2R          

C)  \[2\pi R\]            

D)  \[7\pi R\]

Correct Answer: B

Solution :

 Total time \[=140\text{ }s\] Displacement in\[20\text{ }s=2R\] \[\therefore \] Displacement in 140 s = Displacement in\[20s=2R\]