[单选题]
A 0.50-kg mass is attached to the end of a 1.0-m string.u5-l3jqq2px v The syste7 pjwjxe31j (64xahy vm is whirled in a horizontal circular path. If the maximum tension that the string can withstand is 350 N. What is the maximum speed of the mass if the stj ehy1a4(wxxp76 3jj vring is not to break?