A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from point A which is at a height h = 5 cm. Maximum value of R for the body to successfully complete the loop is

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5 cm

154 cm

103 cm

2 cm

answer is D.

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Detailed Solution

Condition for vertical looping h=52r=5cm ∴r=2cm

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