Second exercise (7.5 pts]: Determination of the moss of the rod The owen of this exercise is to deterowie the mass of the rod AA For this alm, consider a conducting rod AB of length L-100 cm and internal resistance 100 mQ is placed on a double u-shaped conducting rod (N=2) of negligible internal resistance with a Jamip act as resistor of resistance 400m(. The whole set up is placed in a constant magnetic field 8=0 751 making angle 30 with normal vector mil Figure4). "At t=0 the rode slides down from Inklal height he=120em, with constant speed 5cm/'s without friction and air resistance: Thus, the lamp glowed (Take