A body is allowed to slide on a frictional less track from rest under-gravity. The track ends in a circular loop of diameter D. What should be the minimum height of the body in terms of D, so that it may successfully complete the loop?

A body is allowed to slide on a frictional less track from rest under-

1.	A body is allowed to slide on a frictional less track from rest under-gravity. The track ends in a circular loop of diameter D. What should be the minimum height of the body in terms of D, so that it may successfully complete the loop?
A.	D
B.	5/4 D
C.	2D
D.	4/5 D
Answer» C. 2D