You (or the problem) are using the wrong terms. The problem states there is no friction (between the boxes and the floor), and it should be asking what is the normal force (the horizontal force that one box exerts on the other perpendicular to (normal to) their surfaces in contact with each other) between the two. The force you have calculated is the normal force of the floor on the 60 kg box. What you want is the normal force between the 2 boxes. Are you at all familiar with Free Body Diagrams?Lee Colombo said:Homework Statement
A 60 kg box which in turn pushes a 30 kg box move on wheels so friction is eliminated. The push is 30 N horizontally
Homework Equations
What is the acceration on the system of boxes and what is Normal friction of the 60 kg box on the 30 kg box?
The Attempt at a Solution
The normal friction is 9.8 x60 but I don't know if normal friction can only be hortizontal.
Normal friction is a force that occurs when two surfaces are in contact with each other and are moving relative to one another. It acts in the opposite direction of the motion and is dependent on the weight of the objects and the roughness of the surfaces.
The factors that affect normal friction include the weight of the objects, the roughness of the surfaces, and the amount of force applied to the surfaces. Additionally, the type of material the surfaces are made of can also impact normal friction.
Normal friction acts in the opposite direction of the motion, so it can decrease the overall acceleration of an object. This means that the object will accelerate at a slower rate due to the opposing force of normal friction.
No, normal friction cannot be eliminated completely. However, it can be reduced by using smoother surfaces, adding lubricants, or reducing the weight of the objects in contact with each other.
Normal friction is different from other types of friction, such as sliding friction or rolling friction, because it acts perpendicular to the surface of contact. This means that it is dependent on the weight of the objects and the force applied, rather than the type of motion or surface area in contact.