Friction Review

Front

What is friction?

Back

Friction is a force that opposes the motion of an object when it comes into contact with another surface.

Front

What are the two main types of friction?

Back

The two main types of friction are static friction (when objects are not moving) and kinetic friction (when objects are sliding past each other).

Front

What is 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 is the unit of force?

Back

The unit of force is the Newton (N).

Front

What is the equation for calculating frictional force?

Back

Frictional force (F_f) = coefficient of friction (μ) × normal force (F_N).

Front

What is the normal force?

Back

The normal force is the force exerted by a surface that supports the weight of an object resting on it, acting perpendicular to the surface.

Front

What happens to the acceleration of an object if the net force acting on it is zero?

Back

If the net force acting on an object is zero, its acceleration is also zero.

Front

What is the difference between static and sliding friction?

Back

Static friction prevents motion, while sliding friction acts on objects that are already in motion.

Front

What is the role of friction in everyday life?

Back

Friction allows us to walk without slipping, enables cars to grip the road, and helps objects stay in place.