I WONDER - What Is Friction?

Friction occurs when two objects rub against each other, opposing motion. The level of friction depends on the materials and roughness of the surfaces involved. A rougher surface produces more friction. For instance, a bowling ball rolls further on a wooden floor than on a carpet due to less friction on the wood.

What is the primary cause of friction between two objects?

• The temperature of the objects

• The contact between the objects

• The speed of the objects

• The weight of the objects

In which direction does friction act relative to motion?

• At a 45-degree angle

• Perpendicular to the motion

• In the opposite direction

• In the same direction

What determines the amount of friction between two surfaces?

• The color of the surfaces

• The materials of the surfaces

• The temperature of the surfaces

• The size of the surfaces

How does surface roughness affect friction?

• Smoother surfaces create more friction

• Rougher surfaces create more friction

• Both smooth and rough surfaces create the same friction

• Surface roughness has no effect on friction

Why does a bowling ball travel further on a wooden floor than on a carpet?

• The wooden floor is softer

• The carpet is smoother

• The ball is lighter on the wooden floor

• There is less friction on the wooden floor