A small 0.2-kg sphere B is given a downward velocity v0 and swings freely in the vertical...

A small 0.2-kg sphere B is given a downward velocity v0 and swings freely in the vertical plane, first about O and then about the peg A after the cord comes in contact with the peg. Determine the largest allowable velocity v0 if the tension in the cord is not to exceed 10 N.