A sphere is suspended by a thread of length 𝑙. What minimum horizontal velocity has to be imparted the ball for it to reach the height of the suspension

Question : A sphere is suspended by a thread of length 𝑙. What minimum horizontal velocity has to be imparted the ball for it to reach the height of the suspension

(A) 𝑔𝑙

(B) 2𝑔𝑙

(C) \sqrt{gl}

(D) \sqrt{2gl}

Answer : option (D)

Solution :

A sphere is suspended by a thread of length 𝑙. What minimum horizontal velocity has to be imparted the ball for it to reach the height of the suspension
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