It is difficult to walk on ice because of

Options

A. absence of friction
B. absence of inertia
C. more inertia
D. more friction

Explanation

To solve the question "It is difficult to walk on ice because of," we will analyze the options provided and understand the physics behind walking on ice.

### Step-by-Step Solution:

1. **Understanding the Problem**: The question states that it is difficult to walk on ice. We need to identify the reason behind this difficulty.

2. **Analyzing the Options**:
- **Option 1: Absence of friction**: This suggests that there is very little to no friction between the ice and the shoes.
- **Option 2: Absence of inertia**: This implies that there is no inertia, which is not relevant to walking on ice.
- **Option 3: More inertia**: This suggests that increased inertia makes walking difficult, which is not applicable here.
- **Option 4: More friction**: This implies that increased friction would make walking easier, which contradicts the problem statement.

3. **Identifying the Correct Option**:
- When walking, friction is necessary to provide the grip needed to push off the ground. On a smooth surface like ice, the friction is minimal.
- Without sufficient friction, the feet cannot grip the surface, leading to slipping.

4. **Conclusion**: The correct answer is **Option 1: Absence of friction**. The difficulty in walking on ice is primarily due to the lack of friction between the ice and the shoes, which causes slipping.

### Final Answer:
It is difficult to walk on ice because of the **absence of friction**.

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