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A body slides down a frictionless track which ends in a circular loop of diameter D, then the minimum height h of the body

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A body slides down a frictionless track which ends in a circular loop of diameter D, then the minimum height h of the body in term of D so that it may just complete the loop, is 

(a) h = 5D/2

(b) h = 5D/4

(c) h = 3D/4

(d) h = D/4

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1 Answer

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Best answer

Correct Option  (b) h = 5D/4

Explanation:

[For critical condition of vertical looping]

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