Front

What is friction?

Back

Friction is a force that opposes the relative motion of two surfaces in contact. It acts parallel to the surfaces and can be classified into static and kinetic friction.

Front

What is the coefficient of friction?

Back

The coefficient of friction (μ) is a dimensionless scalar value that represents the ratio of the force of friction between two bodies and the force pressing them together. It varies depending on the materials in contact.

Front

How does mass affect friction?

Back

The frictional force is directly proportional to the normal force, which is affected by the mass of the object. More mass results in a greater normal force and thus greater friction.

Front

What is static friction?

Back

Static friction is the frictional force that prevents two surfaces from sliding past each other. It must be overcome for motion to occur.

Front

What is kinetic friction?

Back

Kinetic friction is the frictional force acting between moving surfaces. It is usually less than static friction for the same materials.

Front

What is the formula for calculating frictional force?

Back

The frictional force (F_f) can be calculated using the formula: F_f = μ * N, where μ is the coefficient of friction and N is the normal force.

Front

What happens to friction when the surface becomes smoother?

Back

When the surface becomes smoother, the coefficient of friction decreases, resulting in a lower frictional force.

Front

What is the role of lubrication in friction?

Back

Lubrication reduces friction by creating a film between surfaces, decreasing the coefficient of friction and allowing smoother motion.

Front

How does the angle of an inclined plane affect friction?

Back

On an inclined plane, the normal force decreases as the angle increases, which can reduce the frictional force acting on an object.

Front

What is the maximum static friction?

Back

Maximum static friction is the highest amount of friction that can be exerted before an object starts to move. It can be calculated using the formula: F_max = μ_s * N.