25. A frictionless track ABCDE ends...
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25. A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from point A which is at heighth = 5 cm. Maximum value of R for a body to complete the loop successfully is 5 cm (a) 2 cm (0) 15 cm

JEE/Engineering Exams
Physics
Solution
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To complete the loop successfully ( sqrt{2 g h}=sqrt{5 g R} ) [ R=frac{2 h}{5}=frac{2 times 5}{5}=2 mathrm{cm} ]
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