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Why the direction of normal reaction is perpendicular to the surface where friction is acting?
This is because fluid pressure always acts in a direction such that the solid in it(whether submerged or not) goes out of the fliud.If the fliud is accelerating horizontally the fluid would want no disruption in its flow and hence take the solid in it in a perpendicular direction(ie the direction of the acceleration).
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Is the reaction force on a surface always perpendicular to the surface?
No, the reaction force on a surface can be at an angle, especially if there are other forces acting on the object. The reaction force is always equal in magnitude and opposite in direction to the force applied by the object on the surface.
What type of contact force is perpendicular to the surface of contact?
Normal force is a type of contact force that is perpendicular to the surface of contact. It is the force that a surface exerts on an object placed on it, acting in a direction perpendicular to the surface.
Does the surface area of an object affect the amount of friction between the object and the surface?
No, it doesn't, the only important thing is the force perpendicular to the surface (weight) and friction coefficient.
Is it true that weight affects the amount of friction between the object and a surface?
No, weight does not directly affect the amount of friction between an object and a surface. The factors that affect friction are the nature of the surfaces in contact and the force pushing them together. The normal force, which is perpendicular to the surface, is what influences the frictional force, not the weight of the object.
What is the relationship of the starting friction to the static friction between two objects?
When an object is at rest on a particular surface, the frictional force keeping it from sliding in any given direction is known as static friction; the magnitude of this force is always less than or equal to the product of those surfaces' static friction coefficient and the component of the gravitational force (weight) of the object perpendicular to the plane of the surface, the latter of which is equal to the normal force that is exerted by the intermolecular bonds in the surface material, upward and perpendicular to the plane of the surface itself. (In other words, Fs ≤ µsFn, where Fs=force of static friction, µs=static friction coefficient, Fn=normal force of surface upon object.)
What is the direction of static friction acting on an object placed on a horizontal surface?
The direction of static friction acting on an object placed on a horizontal surface is opposite to the direction in which the object is trying to move.
What is the definition of a normal force?
The normal force is the perpendicular force exerted by a surface to support an object in contact with it. It acts in the direction perpendicular to the surface.
In which direction does light oscillate if it is reflected off a shiny transparent surface?
Light oscillates in a direction perpendicular to the surface of the shiny transparent surface when it is reflected. This is known as the normal direction.
What is the 'normal' to a surface?
The normal to a surface is an imaginary line that is perpendicular to the surface at a specific point. It indicates the direction that is perpendicular to the surface and is used in geometry and physics to determine angles of incidence and reflection.
What is normal reaction?
Normal reaction refers to the force exerted by a surface in response to an object pressing against it. It is always perpendicular to the surface and acts to support the weight of the object resting on it, preventing it from falling through the surface.
How does mass affect the friction of an object?
According to the laws of mechanics. Friction is defined as the force resisting motion. Whenever there is motion there is friction opposing it. The frictional resistance of a surface is given by an unit less index called coefficient of friction. This depends upon the roughness of the surface. Friction = coefficient * normal reaction Thus, from the formula it is seen that friction is directly proportional to normal reaction and coefficient of friction. Normal reaction is nothing but the the perpendicular reaction provided to a body by a surface as a result of all the perpendicular forces acting on the surface due to the body. for example, consider a block of wood on a table. Weight of the body acts downwards perpendicular to the surface of the table.Thus here the table will apply an equal and opposite force on the block(Newton's third law). This force will be perpendicular to the both the block and the table surface.Thus it is known as the normal reaction. As is seen that every object exerts it weight upon the surface it is placed on. Weight = mass* g. Where g = acceleration due to gravity(=9.81 for earth surface) Thus increase in mass increases normal reaction. Hence increasing friction. "FRICTION VARIES DIRECTLY WITH MASS"
What is the direction of static friction on an incline?
The direction of static friction on an incline is parallel to the surface of the incline and opposite to the direction in which an object would slide down the incline.
