Question

a particle moves along a circle of diameter d calculate the distance and displacement after 1 half revolution 2 complete revolution

Answer 1

diameter of circle = d

so, circumference ( distance covered in 1 revolution ) = 2 pie r = pie d

(1)  distance covered in 1 half revolution = pie d/2

       displacement = d + d = 2d

(2) distance covered in 2 revolutions = 2 pie d

     displacement = zero