Block in the figure weighs 1.70 and block weighs 3. The coefficient of kinetic friction between all surfaces is 0.

Block in the figure weighs 1.70 and block weighs 3.40 . The coefficient of kinetic friction between all surfaces is 0.500.Find the magnitude of the horizontal force necessary to drag block to the left at a constant speed of 2.00 if rests on and moves with it (figure a).