If the mass of a yoyo is 30g and the length of the string is 420 mm, what is the maximum velocity of the yoy?

9. A yoyo is whirled around in a circle over some yoyo’s head. The string will break if the force is greater than 15N. If the mass of the yoyo is 30g and the length of the string is 420 mm, what is the maximum velocity of the yoyo?