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 or a person driving a car on a rough road.

Explanation

To determine which driver would have to apply brakes harder to stop their vehicle, we can analyze the situation based on the friction between the tires and the road surface.

### Step-by-Step Solution:

1. **Identify the Conditions**:
- Both drivers are driving at the same speed.
- Both vehicles have similar brakes and tires.
- One vehicle is on a smooth road, and the other is on a rough road.
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