Compare which of the two drivers, in each case given below, would have to apply brakes harder in order to stop their vehicle. Give a reason for each answer. (Assume all vehicles are moving at the same speed and have similar brakes and tyres).
A person driving a car on a smooth road in heavy rain or a person driving a car on a smooth road on a dry day.

Explanation

To determine which driver would have to apply the brakes harder to stop their vehicle, we need to analyze the conditions of the road surface in each scenario.

### Step-by-Step Solution:

1. **Identify the Conditions**:
- **Driver 1**: Driving on a smooth road in heavy rain.
- **Driver 2**: Driving on a smooth road on a dry day.

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