Question

An object starts moving on a circular track of radius R with constant speed v. After covering quarter of a circle the ratio of its distance to displacement will be

Answer 1

distance =$\pi r$/2displacement is the shortest distance. Connecting center and two arc points, it will form a Right angled triangle with radius on two sides and displacement on third side.so displacement is $\sqrt{2} r$
     so ratio =($\pi r$/2)/$\sqrt{2} r$   so ans =$\pi$:2$\sqrt{2}$

Answer 2

pi.

2underroot 2

ur answer

hope u understand