Question

To create friction, we need ________surfaces.​

Answer 1

Increasing the area of surfaces that are touching also increases the friction between them. That's why you can't slide as far across ice with shoes as you can on the thin blades of skates. The greater surface area of the soles of the shoes cause more friction and slow you down. Heavier objects also have more friction.

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Answer 2

Rub each other’s surfaces