Two metal strips, each of length, each of length l, are clamped parallel to each other on a horizontal floor with a separation b between them. A wire of mass m line on them perpendicularly as shown in figure. A vertically upward magnetic field of strenght B exists in the space. The matal strips are smooth but the cofficient of freiction between the wire and the floor is `mu`. A current i is established when the switch S is closed at the instant `t=0`. Discuss the motion of the wire after the switch is closed. How far away from the strips will the wire reach?