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Not able to get the answer foe this question.......plez help

Not able to get the answer foe this question.......plez help

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Grade:11

1 Answers

PASUPULETI GURU MAHESH
126 Points
7 years ago
From law of conservation of energy then k1+u1=k2+u2 
At point a k1= 0, u1 = mgh  where h =3r
at point b u2=0 ,  k2=1/2 mv2
 
 We substitute in  above equation we get v =root of 6gr
 

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