Stainless-steel poles were arranged by an artist for the purpose of producing an enhanced display of lightning in a field of nearly one square mile. The magnetic field in New Mexico, where the rods are placed, dips 64 degree below the horizontal and has a horizontal component of magnitude 2.5 x 10-5 T. Find the magnetic force on one of these poles, 6.89 meter long, when it transmits an upward current of 1.98 x 104 A during a lightning discharge.