A man is at rest in the middle of apond on perfectly smooth ice. He can get himself to the shore by making use of Newton's

Options

A. first law
B. second law
C. third law
D. all the laws

Answer

To solve the problem of how a man at rest in the middle of a pond on perfectly smooth ice can get himself to the shore, we can analyze the situation using Newton's laws of motion, particularly focusing on the third law.

### Step-by-Step Solution:

1. **Understanding the Situation**:
- The man is at rest on a smooth ice surface, which means there is very little friction between him and the ice.
- He wants to move towards the shore but is unable to do so just by trying to walk or push against the ice directly.

2. **Applying Newton's Third Law**:
- Newton's third law states that for every action, there is an equal and opposite reaction.
- When the man tries to push against the ice to move forward, he exerts a force on the ice.

3. **Force Interaction**:
- As the man pushes backward against the ice, the ice exerts an equal and opposite force forward on the man.
- This reaction force from the ice is what allows him to move towards the shore.

4. **Continuous Action**:
- Since the ice is smooth and there is minimal friction, the man needs to keep pushing against the ice repeatedly.
- Each time he pushes backward, he receives a forward reaction force from the ice, which gradually propels him towards the shore.

5. **Conclusion**:
- By continuously applying force in the backward direction, the man can effectively use the reaction force from the ice to move himself towards the shore.
- Thus, Newton's third law is the key principle that allows him to reach the shore.

### Final Statement:
The man can get himself to the shore by repeatedly pushing against the ice, utilizing Newton's third law of motion, which allows the reaction force to propel him forward.

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