A body is allowed to slide down a frictionless track from rest position at its top under gravity. The track ends in a circular loop of diameter D. Then, the minimum height of the inclined track ( in terms of D ) so that it may complete successfully the loop is

A body is allowed to slide down a frictionless track from rest positio

1.	A body is allowed to slide down a frictionless track from rest position at its top under gravity. The track ends in a circular loop of diameter D. Then, the minimum height of the inclined track ( in terms of D ) so that it may complete successfully the loop is
A.	3D/4
B.	9D/4
C.	5D/4
D.	7D/4
Answer» D. 7D/4

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A body is allowed to slide down a frictionless track from rest position at its top under gravity. The track ends in a circular loop of diameter D. Then, the minimum height of the inclined track ( in terms of D ) so that it may complete successfully the loop is

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