question_answer

In 1.0 s, a particle goes from point A to B, moving in a semi-circle of radius 1.0 m (as shown in the figure). The magnitude of the average velocity of the particle is

A)  3.14 m/s            

B)  2.0 m/s

C)  1.0 m/s               

D)  0

Correct Answer: B

Solution :

                From figure AB = 2r                 \[AB=2\times 1=2\,m\] Average velocity \[=\frac{displacement}{time}\]                 \[=\frac{2}{1}=2\,m/s\]