4A Friction

Front

What is friction?

Back

Friction is a force that opposes the motion of an object, acting in the opposite direction of movement.

Front

What direction does friction act in relation to movement?

Back

Friction acts in the opposite direction of movement.

Front

Does the weight of objects affect the amount of friction?

Back

Yes, the amount of friction depends on the weight of the objects pressing together.

Front

What does friction produce when objects rub against each other?

Back

Friction produces heat.

Front

What happens to friction when smooth surfaces rub together?

Back

There is less friction when most objects with smooth surfaces rub.

Front

How does more friction affect speed?

Back

More friction decreases speed.

Front

What is the relationship between rough surfaces and friction?

Back

Rough surfaces create more friction compared to smooth surfaces.

Front

Can friction be helpful? Give an example.

Back

Yes, friction helps us walk without slipping.

Front

What is static friction?

Back

Static friction is the friction that prevents an object from starting to move.

Front

What is kinetic friction?

Back

Kinetic friction is the friction acting on an object that is already in motion.