< Back
friction
Definition
Friction is a force that opposes the motion of two surfaces that are touching each other. It is what makes it hard to slide a book across a table or to walk on ice.
Friction is caused by the roughness of the two surfaces. When two surfaces touch, the tiny bumps on each surface catch on each other and prevent the surfaces from sliding smoothly.
Friction can be a force that helps us, such as when we walk or drive a car. But it can also be a force that hinders us, such as when we try to slide a heavy object across the floor.
How can the word be used?
The friction between the tires and the road caused the car to skid.
Different forms of the word
Noun: friction, frictions.
Adjective: frictional.
Etymology
The word "friction" comes from the Latin word frictio, which means "rubbing" or "friction". The Latin word frictio is made up of the verb fricare, which means "to rub", and the suffix -tio, which indicates an action.
Question
Which of the following surfaces would provide the greatest amount of friction and why? Sand, Carpet, Wood, Tile.