Two boxes of hockey equipment that are initially at rest in the middle of the ice surface of a skating rink. To push it to the side of the rink, you exert a constant horizontal force on the top box. The following questions explore what happens depending on how hard you push. The box surfaces are rough. The coefficient of static friction between them is μᵍ. The coefficient of kinetic friction is μₛ
If the magnitude of the force you exert on the top box is small enough, the boxes will move together across the ice without slipping on each other. What would the magnitude and direction of the friction force exerted on the top box by the bottom box be in that situation?