Why does the horse rider fall forward when a horse at full gallop stops suddenly ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Scenario**:
- A horse is galloping at a high speed, and a rider is sitting on top of the horse. Both the horse and the rider are moving together at the same velocity.

2. **Sudden Stop of the Horse**:
- When the horse suddenly stops, it experiences a rapid deceleration. This means that the horse's velocity changes from a high speed to zero almost instantaneously.

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