Question

A body moves in a circle of radius "2R".what is the distance covered and displacement of the body after 2 complete round?

Answer 1

Circumference of the given circle = 2πr = 2π(2R) = 4πR.

Distance in 2 complete rounds
= 2(circumference) = 2(4πR) = 8πR

Displacement in 2 complete rounds = 0

Answer 2

Radius = 2R

Distance will be equal to circumference

Therefore, Distance

=2* 2 * pie * 2R

(the first "2" is the two rounds by body)

But Displacement will be 0 because it will be at same place after completing 2 rounds