Friction

Front

What is friction?

Back

Friction is a contact force that opposes the relative motion of two surfaces in contact.

Front

What happens to an object in motion without friction?

Back

An object in motion would continue to move at a constant speed indefinitely.

Front

How does surface roughness affect friction?

Back

Rougher surfaces generally increase friction, making it harder for objects to slide over each other.

Front

What is the role of gravity in the motion of a ball rolling down a hill?

Back

Gravity pulls the ball down the hill, causing it to accelerate.

Front

What force causes a rolling ball to eventually stop?

Back

Frictional force causes the rolling ball to slow down and eventually stop.

Front

Is it true that friction can be beneficial in everyday life?

Back

Yes, friction is beneficial as it allows us to walk, drive, and hold objects without slipping.

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 friction affect the speed of an object on a surface?

Back

Friction opposes motion, which can slow down an object moving across a surface.

Front

What is static friction?

Back

Static friction is the force that keeps an object at rest and prevents it from starting to move.

Front

What is kinetic friction?

Back

Kinetic friction is the force that opposes the motion of an object that is already sliding.