Answer
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Hint – In this question use the concept that static-friction acts upon a body when it’s not in motion and is at rest, this friction helps the body retain its position unless an external force is applied to it. Limiting friction can be considered as a threshold friction that is applied in order to prevent motion when an external force is applied, kinetic friction comes into play when the external force has exceeded the value of limiting friction, the friction that is applied now is known as kinetic friction.
Step by step answer:
Static friction
Static friction is a self-adjusting force because it comes into play when the body is lying over the surface of another body without any motion.
So from point O to A it is called static friction.
Limiting friction
If we have not applied any force on a body to move the body, the frictional force also becomes zero. If we start applying force, with the applied force, the frictional force also starts increasing. This happens until the applied force is less than the limiting frictional force.
When that body overcomes the force of static friction, the maximum value of static friction is reached, which is known as limiting friction.
So, we increase the force from point E till point F.
As shown in the figure the maximum value of static friction is ${\left( {{F_s}} \right)_{\max }}$at point B which is called as limiting friction of the body to overcome the force of static friction.
So from point A to B it is called as limiting friction.
Kinetic friction
After the limiting friction, the frictional force is not going to increase further. At this stage, the object moves overcoming the frictional force which is at a constant value. This is called kinetic friction.
As shown in the figure after the limiting friction the frictional force is constant when we increase the applied force known as Kinetic friction denoted by ${F_k}$.
So to overcome this limiting friction kinetic friction comes into play from point B to point C thereafter it is constant.
So the maximum value of the frictional force is called the limiting frictional force.
Hence option (A) is the correct answer.
Note – In the graphical representation region OE is the region where the object is stationary holding its current position and the static friction is acting upon it, the region EF is where external force has been applied and the friction is opposing the change of state, after F the object is in motion and now kinetic friction is acting upon the object.
Step by step answer:
![seo images](https://www.vedantu.com/question-sets/278bbaa0-b08f-4c81-b7f1-e02e13466b422277615989728910380.png)
Static friction
Static friction is a self-adjusting force because it comes into play when the body is lying over the surface of another body without any motion.
So from point O to A it is called static friction.
Limiting friction
If we have not applied any force on a body to move the body, the frictional force also becomes zero. If we start applying force, with the applied force, the frictional force also starts increasing. This happens until the applied force is less than the limiting frictional force.
When that body overcomes the force of static friction, the maximum value of static friction is reached, which is known as limiting friction.
So, we increase the force from point E till point F.
As shown in the figure the maximum value of static friction is ${\left( {{F_s}} \right)_{\max }}$at point B which is called as limiting friction of the body to overcome the force of static friction.
So from point A to B it is called as limiting friction.
Kinetic friction
After the limiting friction, the frictional force is not going to increase further. At this stage, the object moves overcoming the frictional force which is at a constant value. This is called kinetic friction.
As shown in the figure after the limiting friction the frictional force is constant when we increase the applied force known as Kinetic friction denoted by ${F_k}$.
So to overcome this limiting friction kinetic friction comes into play from point B to point C thereafter it is constant.
So the maximum value of the frictional force is called the limiting frictional force.
Hence option (A) is the correct answer.
Note – In the graphical representation region OE is the region where the object is stationary holding its current position and the static friction is acting upon it, the region EF is where external force has been applied and the friction is opposing the change of state, after F the object is in motion and now kinetic friction is acting upon the object.
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