An insulating rod having linear charge density = 52.0 µC/m and linear mass density = 0.100 kg/m is released from rest in a uniform electric field E = 135 V/m directed perpendicular to the rod. A vertical rod is labeled ", ". An electric field pointing from left to right, perpendicular to the length of the rod, is labeled vector E and is present on both the left and right sides of the rod.
(a) Determine the speed of the rod after it has traveled 2.50 m.
m/s

(b) How does your answer to part (a) change if the electric field is not perpendicular to the rod?