Smooth surfaces have ____ friction (more / less)
Smooth surfaces have less friction.
Where does friction act?
Friction occurs between the pencil and the paper.
Give an example of when friction acts.
(Student gives answer.)
When does friction act? (When two surfaces are in contact. / When two surfaces are not in contact.)
When two surfaces are in contact.
What force opposes motion between two surfaces?
Friction is the force that opposes motion between two surfaces.
A rough surface, like grass, has (more / less) friction.
A rough surface, like grass, has more friction.
Where does friction act?
It acts between the tires and the road./ It acts between the pedals and shoes./ It acts between the handlebars and hands./ etc.
Where does friction act?
It acts between the ice and the skates.
Rough surfaces have (more / less) friction.
Rough surfaces have more friction.
Give an example of when friction acts.
(Student gives answer.)
__ is a push or pull that changes an objects motion, direction, speed, or shape.
Force is a push or pull that changes an objects motion, direction, speed, or shape.
Give an example of when friction acts.
(Student gives answer.)
Where will a ball roll the fastest - on a rough surface or on a smooth surface?
A ball will roll the fastest on a smooth surface.
Give an example of when friction acts.
(Student gives answer.)
Where does friction act?
Friction acts between the wheels and the grass./ Friction acts between the dog's feet and the grass./ etc.
What force opposes motion between two surfaces?
Friction is the force that opposes motion between two surfaces.
