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Grade Upto college level Engineering Entrance Exams

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)4/5 D (c)5/4 D (d) 2D

Profile image of sumit kumar
12 Years agoGrade Upto college level
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2 Answers

Profile image of Saurabh Koranglekar
6 Years ago
Dear student

The answer is option c

Regards
Profile image of Vikas TU
6 Years ago
Velocity at bottom of loop to do complete circular motion is √5gr , where r is radius.
By applying conservation of energy :
mgh=(1/2)*m(5gd/2)
h=5d/4

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