Heavier objects also have more friction. Can you explain why?

Explanation

To explain why heavier objects have more friction, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Friction**: Friction is a force that opposes the motion of an object. It acts between two surfaces in contact. The amount of friction depends on two main factors: the nature of the surfaces in contact and the normal force acting between them.

2. **Normal Force**: The normal force is the force exerted by a surface to support the weight of an object resting on it. It acts perpendicular to the surface. For an object resting on a flat surface, the normal force is equal to the weight of the object.

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