# On what factors does the limiting value of the force of static friction depends Class 8?

## On what factors does the limiting value of the force of static friction depends Class 8?

Laws of Limiting Friction (c) The magnitude of the limiting friction and the normal force between the two surfaces are directly proportional. (d) The limiting friction is dependent on the material, nature of the surfaces that are in contact, and the smoothness.

What is the limiting value of static friction?

If the applied force is increased further, a stage reaches when the body just begins to move. At this stage the force of static friction is maximum (fs=max). The maximum force of friction when the body is just starting to move is called the limiting value of static friction or limiting friction.

What is the limiting value of friction?

The maximum friction that can be generated between two static surfaces in contact with each other. Once a force applied to the two surfaces exceeds the limiting friction, motion will occur. For two dry surfaces, the limiting friction is a product of the normal reaction force and the coefficient of limiting friction.

### What are the factors on which the force of friction depends?

The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.

Does the force of friction depends on the area of contact?

It does not depend the area of contact; it doesn’t depend on the sliding speed. Friction does not depend on the amount of surface area in contact between the moving bodies or (within certain limits) on the relative speed of the bodies. It does, however, depend on the magnitude of the forces holding the bodies together.

• Friction is responsible for many types of motion.
• It helps us walk on the ground.
• Brakes in a car make use of friction to stop the car.
• Asteroids are burnt in the atmosphere before reaching Earth due to friction.
• It helps in the generation of heat when we rub our hands.

#### Is limiting friction directly proportional to area of contact?

As long as the normal reaction remains the same, the magnitude of limiting friction is independent of the area, and the shape of surfaces that are in contact. The magnitude of the limiting friction F is directly proportional to the normal reaction R between the two surfaces which are in contact.

Is static or limiting friction greater?

In short, static friction is the same as the force being applied because the body isn’t moving. Static friction is acting due to the body tends to move when a force is acting on it. Limiting friction is the friction acting on a body when it is about to start moving. Commonly, limiting friction is the highest.

What is limiting friction BYJU’s?

Limiting friction is defined as the friction which is generated between the two static surfaces that come in contact with each other. It is the product of the normal force and the coefficient of limiting friction.

## What are the 4 types of friction?

Different types of motion of the object gives rise to different types of friction. Generally, there are 4 types of friction. They are static friction, sliding friction, rolling friction, and fluid friction.

What is the force of friction equal to?

normal force
Friction acts opposite to the direction of the original force. The frictional force is equal to the frictional coefficient times the normal force. Friction is caused due to attractive forces between the molecules near the surfaces of the objects.

How does the force of friction depends on the area of contact of two surface?

The force due to friction is generally independent of the contact area between the two surfaces. Note that this relationship breaks down when the surface area gets too small, since then the coefficient of friction increases because the object may begin to dig into the surface.

### How is the limiting coefficient of static friction dimensionless?

The limiting coefficient of static friction is a dimensionless scalar and does not need units. The limiting coefficient of static friction between two surfaces depends on the two surfaces, and as such, should be the same for the same pair of surfaces.

Which is true of the laws of static friction?

Laws of Static Friction. The maximum force of static friction is not dependent on the area of contact. The maximum force of static friction is comparative to the normal force i.e., if the normal force increases, the maximum external force that the object can endure without moving, also increases.

Which is the best definition of limiting friction?

Limiting friction is the case of static friction where an object is right on the edge of moving, any more force applied to the object will cause it to move. Limiting friction is the largest value that the static friction can take Is coefficient of friction or coefficient of limiting friction are same?

#### What is the coefficient of a sliding friction?

(The force of kinetic, or sliding friction, has a different coefficient associated with it called the coefficient of kinetic friction and denoted ​ μk .) A child tries to push a 10-kg rubber box horizontally along a rubber floor. The static friction coefficient is 1.16. What is the maximum force the child can use ​ without ​ the box moving at all?