Question

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

Answer 1

Examples to show that friction is a friend and a foe: Friction is friend: (i) Friction allows us to grip and catch different objects. (ii) It helps us to walk comfortably on the surface.

Answer 2

AS A FRIEND

⇒ Friction helps us to walk

⇒  Friction helps to prevent slipping

⇒ Friction helps us to grip objects.

⇒  Friction is used for applying brakes in cars

⇒ Friction helps in lighting a match

⇒  Friction is helpful for rubbing hands for warmth

AS A FOE

⇒ Friction causes less efficiency of machines

⇒ It leads to loss of energy in the form of heat

⇒ It causes resistance in a conductor

⇒ Friction is responsible for damage of machine parts

Hope it helps