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

How does the weight of an object affect friction?

Back

The greater the weight of an object, the greater the normal force, which increases the frictional force.

Front

What is the coefficient of friction?

Back

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

Front

What happens to friction when surfaces are smoother?

Back

Smoother surfaces have less friction compared to rougher surfaces.

Front

What is static friction?

Back

Static friction is the frictional force that must be overcome to start moving an object at rest.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force acting on an object that is already in motion.

Front

How does temperature affect friction?

Back

Increased temperature can reduce friction by causing surfaces to become smoother or by changing material properties.

Front

What is the formula for calculating frictional force?

Back

Frictional force (f) = coefficient of friction (μ) × normal force (N).

Front

What is the role of surface area in friction?

Back

Surface area does not significantly affect friction; it is primarily dependent on the nature of the surfaces and the normal force.