A 2.60-N metal bar,1.50 m long and having a resistance of 10.0 Ω, rests horizontally on co...

A 2.60-N metal bar,1.50 m long and having a resistance of 10.0 Ω, rests horizontally on conducting wires connecting it to the circuit shown in below Fig. The bar is in a uniform, horizontal, 1.60-T magnetic field and is not attached to the wires in the circuit. What is the acceleration of the bar just after the switch S is closed?

Figure: