Give examples to show that friction is both a friend and a foe

cbse
cbse-class-8-science
friction

#1

Give examples to show that friction is both a friend and a foe.
Answer:

Advantages of friction:

  • We are able to walk because of friction.
  • Friction between the tip of the pen and a paper allows us to write.

Disadvantages of friction:

  • Tyres and soles of shoes wear out because of friction.
  • Friction between the different parts of machines produces heat. This can damage the machines.