Explain why a horse cannot pull a cart and run in empty space

Explanation

To explain why a horse cannot pull a cart and run in empty space, we can break down the reasoning into several steps:

### Step-by-step Solution:

1. **Understanding the Action and Reaction Forces**:
- When the horse tries to pull the cart, it exerts a force on the ground by pushing it backward. This force can be denoted as \( F \).

2. **Newton's Third Law of Motion**:
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