Answers

2016-04-12T22:30:42+05:30
For the circular path,
diameter, d = 5 m 
Number of revolutions = 2

So, DIstance covered = 2 * Circumference
                                   = 2 * πd
                                   = 2 * 22/7 * 5
                                   = 220/7
                                   ≈ 31.43 m

Moreover, the particle comes back to its starting point after 2 revolutions. So, the displacement is 0 m.
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2016-04-13T10:12:10+05:30
Radius is 2.5 m
   Distance if 2 * Circumference of Circle=2(2*pi*r)=2 x 2 x 3.14 x 2.5=31.4m
Net Linear displacement is Zero Because Particle Returns to its mean Position
 
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