Question

A particle is moving in a circle of diameter 5m. calculate the distance covered and displacement when it covers three revolution.
Give Answer In Full Step Or Method.

Answer 1

diameter = 5m
radius = 2.5m
distance in 1 revolution = 2 (pi) r = 2 * 22/7 * 2.5
distance in 3 revolutions = 3* 22/7* 2* 2.5 (we could take the value of 22/7 as 3.14)
                                  = 3* 3.14* 5 = 9.42* 5 = 47.10   
as the body comes back to the same position the displacement is 0

Answer 2

diameter of the circle = 5 m

radius of the circle = 2.5 m

circumference of the circle = 2πr

                                              = 2 × 22/7 × 2.5

                                             = 15.71 cm

distance covered by the particle = 3 × 15.714

                                                        = 47.14 cm

displacement = 0 cm