Static/Kinetic Friction

Front

What is static friction?

Back

Static friction is the force that resists the initiation of sliding motion between two surfaces that are in contact and at rest relative to each other.

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of two surfaces sliding past each other.

Front

What is the coefficient of friction?

Back

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

Front

What factors affect static friction?

Back

Static friction is affected by the type of surfaces in contact and the normal force (weight) pressing them together.

Front

What is rolling kinetic friction?

Back

Rolling kinetic friction is the frictional force that opposes the motion of an object that is rolling over a surface.

Front

How do you calculate the coefficient of static friction?

Back

The coefficient of static friction (μs) can be calculated using the formula: μs = F/N, where F is the force required to overcome static friction and N is the normal force.

Front

What is the direction of frictional force when an object is pushed?

Back

The frictional force acts in the opposite direction to the applied force.

Front

What is the difference between static and kinetic friction?

Back

Static friction prevents motion between stationary objects, while kinetic friction acts on objects that are already in motion.

Front

What is the formula for calculating the force of friction?

Back

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

Front

What happens to friction when the surface is smoother?

Back

Friction decreases when the surfaces in contact are smoother, resulting in a lower coefficient of friction.