Question 1 Why is it difficult to move on wet marble floor? Question 2 Why is it difficult to walk properly on a well polished floor? Question 3 What prevents you from slipping every time you take a step forward? Question 4 What enables us to fix nails in a wall and knots to be tied? Question 5 Why does a man slip when he steps on a banana peel thrown on the … [Read more...] about Advantages of friction