Two boxes sit side by side on a smooth horizontalsurface. The lighter box has a mass of 5.2 kg, the heavier box hasa mass of 7.4 kg.
a) Find the contact force between these boxes when ahorizontal force of 5.0 N is applied to the light box.
b) Find the contact force between these two boxes when thesame 5.0 N force is applied to the heavy box.