Can you imagine being able to walk at all if there is no friction?

Explanation

### Step-by-Step Solution:

1. **Understanding Friction**: Friction is a force that opposes the relative motion between two surfaces in contact. It is essential for various activities, including walking.

2. **Role of Friction in Walking**: When we walk, we push our foot backward against the ground. This action creates a reaction force due to friction, which pushes us forward. Without friction, this reaction force would not exist.

3. **Applying Force**: As we apply force with our legs to move forward, friction acts in the opposite direction to prevent slipping. This frictional force is crucial for maintaining our balance and allowing us to walk.

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