Delaware Defensive Driving Practice Test

How does the power of the force change when driving on a slippery surface?

1. It decreases

2. It remains the same

3. It increases

4. It can vary

The correct answer is: It increases

When driving on a slippery surface, such as wet, icy, or snowy roads, the ability of a vehicle to maintain traction is significantly compromised. This means that the force exerted between the tires and the road is reduced, resulting in decreased friction. As a result, while the actual power of the engine remains constant, the effectiveness of that power to accelerate, decelerate, or handle turns is diminished. In this context, the correct answer highlights that an increase in the power required to maintain control of the vehicle on slippery surfaces can lead to skidding or losing control. Drivers may need to apply more force on the brakes or steering input to maintain direction, thus feeling as though they are dealing with an increased force difficulty due to the slippery conditions. This understanding is crucial for drivers to recognize that their normal driving techniques must be adjusted to ensure safety in such conditions. Although the power from the engine itself does not increase, the demands on the vehicle and the driver's input are heightened.