A 1.0 kg copper rod rests on two horizontal rails 1.0 m apart and carries a current of 40 A from one rail to the other. The coefficient of static friction between rod and rails is 0.60. What is the smallest vertical magnetic field that would cause the bar to slide with acceleration 0.6 m/s^2.
maF-μmg FILB then maILB-μmg B(ma+μmg) / (IL) B(1*0.6+0.6*1*9.8) / (40*1) B0.162 T
