Maximum value of frictional force is called

Options

A. Limiting friction
B. Static friction
C. Sliding friction
D. Rolling friction

Answer

To solve the question regarding the maximum value of frictional force, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Friction**: Friction is a force that opposes the relative motion of two surfaces in contact. It can be classified into two main types: static friction and kinetic friction.

2. **Static Friction**: This is the frictional force that prevents an object from starting to move. It acts when a force is applied to an object but is not enough to overcome the frictional force.

3. **Maximum Value of Static Friction**: The maximum value of static friction is the greatest force that can be applied to an object before it begins to move. This value is crucial because it determines the threshold at which motion begins.

4. **Limiting Friction**: The maximum static frictional force is referred to as "limiting friction." It is the force that must be overcome to initiate the movement of the object.

5. **Example**: For instance, if a block resting on a surface requires a force of 70 Newtons to start moving, then the limiting friction in this case is 70 Newtons. This means that the maximum static frictional force that was acting on the block to prevent its movement was 70 Newtons.

6. **Conclusion**: Therefore, the maximum value of frictional force is called "limiting friction."

### Final Answer:
The maximum value of frictional force is called **limiting friction**.

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