Friction Flashcard

Front

What is friction?

Back

Friction is the 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 surface roughness affect friction?

Back

Rougher surfaces generally increase the force of friction due to greater interlocking of surface irregularities.

Front

What is the coefficient of friction (μ)?

Back

The coefficient of friction is a dimensionless value that represents the ratio of the force of friction between two bodies and the normal force pressing them together.

Front

What is the formula for calculating the force of friction?

Back

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

Front

What happens to friction when an object starts moving?

Back

The force of friction typically decreases when an object transitions from static to kinetic motion.

Front

What is the normal force?

Back

The normal force is the perpendicular force exerted by a surface on an object resting on it, counteracting the object's weight.

Front

Does increasing the surface area in contact affect the force of friction?

Back

No, the force of friction remains the same regardless of the surface area in contact.

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.