Question :
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?
1. D
2. 5/4 D
3. 2D
4. 4/5 D
Answer :
2 - 5/4 D
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