Question

Explain why, the soles of our shoes wear out gradually.

Answer 1

Answer:

because we wear them and while walking we overcome the force of friction. which applies force in the opposite direction we walk, so our shoe's sole rub when we walk....

so gradually the soles of our shoes wear out.

Answer 2

Wear and tear

Explanation:

Friction always opposes relative motion between the surfaces in contact with each other. The force of friction between the shoe and the ground brings about wear and tear of the shoe's bottom. Tiny pieces of the sole get torn off of the shoe due to friction. Thus, the  soles of our shoes wear out gradually. The longer the product is used, the more the wear and tear.