# 18.A particle of mass m is attached to a disc of equal mass m by means of a slack string as shown.The disc is hinged about its centre C on a horizontal smooth table.The particle  is thrown on the horizontal table with initial velocity v.Find its velocity , when the string becomes taut. 1)  V 2)$\frac{V}{3}$ 3)$\frac{2V}{3}$ 4)$\frac{3V}{4}$

2v/3
• -2
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