Two particles `A` and `B` of equal mass `m` are attached by a string of length `2l` and initially placed over a smooth horizontal table in the position shown in fig. particle `B` is projected across the table with speed `u` perpendicular to `AB` as shown in the figure. find the velocities of each particle after the string becomes taut and the magnitude of the impulse tension.

Options

A. `(usqrt3)/(4)`
B. `usqrt3`
C. `(usqrt3)/(2)`
D. `(u)/(2)`

Answer

A