Question

Give 2examples of each to show that friction is both a friend and a foe.​

Answer 1

Answer:

Friction as a friend-

1. While walking- Without friction we cannot walk and will only slip and slide.

2. Generate heat in winter- When we rub our hands friction will make them warmer in winters.

Friction as a foe-

1. Spaceships need a friction-resistant coating to fly out of the Earth's atmosphere.

2. It resists motion and thus causes wear and tear of moving parts of vehicles.

Answer 2

Answer:

Firstly, Friction as a friend it helps us to walk freely on a surface

Secondly, Friction as a foe makes the machines' gear loose and sometimes break it

Hope it Helps!