A particle in a circular motion covers a distance of 0.5 pi rwhere r is the radius of the circular path. What is the angular displacement ?

A particle in a circular motion covers a distance of 0.5 pi rwhere r i

1.	A particle in a circular motion covers a distance of 0.5 pi rwhere r is the radius of the circular path. What is the angular displacement ?
Answer» ANSWER :`90^(@)`