Question

explain the three types of friction?give examples​

Answer 1

Answer:

Types Of Friction

• Static Friction

• Sliding Friction

• Rolling Friction

• Fluid Friction

Static Friction

Static friction is defined as the frictional force that acts between the surfaces when they are at rest with respect to each other.

The magnitude of the static force is equal in the opposite direction when a small amount of force is applied. When the force increases, at some point maximum static friction is reached.

Static Friction Examples

• Skiing against the snow

• Creating heat by rubbing both the hands together

• Table lamp resting on the table

Coefficient Of Static Friction

The coefficient of static friction is denoted as µs. The maximum force of static friction is given as the product of the coefficient of static friction and normal force and force of static friction is less than or equal to the product of the coefficient of static friction and normal force. It is given as:

                                  Fs max = µs η and Fs ≤ µs η

Where,

Fs is the force of static friction

µs is the coefficient of static friction

η is the normal force

Fs max is the maximum force of static friction

What Is Sliding Friction?

Sliding friction is defined as the resistance that is created between any two objects when they are sliding against each other.

Examples Of Sliding Friction

• Sliding of the block across the floor

• Two cards sliding against each other in a deck

Coefficient Of Sliding Friction

The coefficient of sliding friction is denoted as µs. The force of sliding friction is defined as the product of the coefficient of sliding friction and the normal force. It is given as:

                                          Fs = µs. Fn

What Is Rolling Friction?

Rolling friction is defined as the force which resists the motion of a ball or wheel and is the weakest types of friction.

Examples Of Rolling Friction

• Rolling of the log on the ground

• Wheels of the moving vehicles

Coefficient Of Rolling Friction

The coefficient of rolling friction is denoted as µr. The force of rolling friction is defined as the product of the coefficient of rolling friction and the normal force. It is given as:

                                            Fs = µr. Fn

What Is Fluid Friction?

Fluid friction is defined as the friction that exists between the layers of the fluid when they are moving relative to each other.

Examples Of Fluid Friction

• The flow of ink in pens

• Swimming