If action is always equal to the reaction, explain how a horse can pull a cart.

Explanation

To explain how a horse can pull a cart despite the principle that action is always equal to reaction, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding the System**:
- A horse is tied to a cart. The horse needs to exert a force to pull the cart forward.

2. **Force Generation by the Horse**:
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