Give examples to show that friction is both a friend and a foe.
Answers
a) Due to friction, we are able to walk.
b) We are able to write because of the friction between the tip of the pen and paper.
a) Because of friction, the tires and soles of shoes wear out.
b) Friction produces heat between different parts of the machines. This can damage the machines.
Thus,friction is both a friend and a foe.
Answer:
Friction as a friend:
It allows us to grip and catch any object.
It helps us to walk comfortably on the floor.
It helps to minimise the speed or to stop any moving object.
It helps us to write.
Friction as a foe:
It causes wear and tears in objects.
It causes damage to the parts of machines and tools which further require money to get them repaired.
It reduces the speed of moving objects, so more force is required.
It produces hurdles in moving any object freely.