5.3 - Friction

Front

What is the coefficient of friction (μ) if the normal force (F_N) is 100N and the frictional force (F_f) is 20N?

Back

μ = F_f / F_N = 20N / 100N = 0.2

Front

Sliding friction occurs when two _____________ surfaces slide over one another.

Back

solid

Front

What type of friction occurs when air pushes against a moving object causing it to decelerate?

Back

air resistance

Front

True or False: The amount of friction depends on the weight of the objects pressing together.

Back

True

Front

Which type of friction is characterized by an object rolling over a surface?

Back

rolling

Front

Define static friction.

Back

Static friction is the force that keeps an object at rest and prevents it from moving when a force is applied.

Front

What is kinetic friction?

Back

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

Front

What factors affect the coefficient of friction?

Back

The nature of the surfaces in contact and the normal force acting between them.

Front

What is the formula for calculating frictional force?

Back

F_f = μ * F_N

Front

What is the difference between static and kinetic friction?

Back

Static friction acts on objects at rest, while kinetic friction acts on objects in motion.