$0\mathrm{.}75$ m

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$3.)$ A $100\mathrm{.}0-g$ ball on a $r=75\mathrm{.}0-cm-$long string is swung in a vertical circle about a point $2\mathrm{.}00$ m above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height $6\mathrm{.}40$ m above the floor.

a$.)$ What is the velocity of the ball, $v_i,$ when the string breaks?

$q,$ m$/$s

b$.)$ What was the tension in the string the instant before it breaks?

$q,$ N