In a loop-the-loop, a body starts at a height β„Ž = 2𝑅. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is

Question : In a loop-the-loop, a body starts at a height β„Ž = 2𝑅. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is

(A) \sqrt{2gR}

(B) \sqrt{gR}

(C) \sqrt{3gR}

(D) 2\sqrt{gR}

Answer : option (B)

Solution :

In a loop-the-loop, a body starts at a height β„Ž = 2𝑅. The minimum speed with which the body must be pushed down initially in order that it may be able to complete the vertical circle is
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