Friction

Front

What is friction?

Back

Friction is a force that opposes the relative motion of two surfaces in contact.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (preventing motion) and kinetic friction (opposing motion).

Front

What is Newton's 1st Law of Motion?

Back

An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is the unit of force?

Back

The unit of force is the Newton (N).

Front

How does friction affect motion?

Back

Friction opposes the motion of objects, making it harder for them to start moving or to keep moving.

Front

What is the coefficient of friction?

Back

The coefficient of friction is a numerical value that represents the frictional force between two objects.

Front

What is static friction?

Back

Static friction is the frictional force that prevents two surfaces from sliding past each other.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force acting between moving surfaces.

Front

How do you calculate the coefficient of static friction?

Back

The coefficient of static friction (μs) is calculated by dividing the maximum static frictional force by the normal force.

Front

What direction does friction act relative to motion?

Back

Friction acts in the opposite direction to the motion of the object.