you drag a heavy box along a rough horizontal floor by a horizontal rope. Identify the reaction force to each of the following forces: (a) the pull of the rope on a box (b) friction force oin the box (c) the normal force on the box (d) weight of the box
(a) The reaction force to the pull of the rope on the box is likely a confused look from the box, wondering why it's being pulled rather than getting a ticket to the circus.
(b) The reaction force to the friction force on the box is the box thinking, "I thought I signed up for a smooth ride, not a bumpy road trip!"
(c) The reaction force to the normal force on the box is the box thanking gravity for not making it feel abnormal.
(d) The reaction force to the weight of the box is the floor thinking, "Why me? Why do I always have to bear the weight of the world (in this case, the box)?"
To identify the reaction force to each of the forces mentioned, we need to understand Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction.
(a) The pull of the rope on the box: According to Newton's Third Law, the reaction force to the pull of the rope is the force exerted by the box on the rope. This force is equal in magnitude but opposite in direction to the pull of the rope.
(b) Friction force on the box: The reaction force to the friction force acting on the box is the force exerted by the box on the floor. When you drag a heavy box along a rough floor, the friction force opposes the motion. According to Newton's Third Law, the box exerts an equal and opposite force on the rough floor.
(c) The normal force on the box: The reaction force to the normal force on the box is the force exerted by the floor on the box. The normal force is the perpendicular force exerted by a surface to support an object. In this case, the floor pushes up on the box with a force equal in magnitude but opposite in direction to the weight of the box.
(d) Weight of the box: The reaction force to the weight of the box is the force exerted by the box on the floor. This is due to gravity pulling the box downward. According to Newton's Third Law, there is an equal and opposite force exerted by the box on the floor.
In summary, the reaction forces for each mentioned force are as follows:
(a) Pull of the rope on the box: Force exerted by the box on the rope.
(b) Friction force on the box: Force exerted by the box on the floor.
(c) Normal force on the box: Force exerted by the floor on the box.
(d) Weight of the box: Force exerted by the box on the floor.