Final answer:
It is false that driving in the tracks of the vehicle ahead completely removes the risk of hydroplaning. Light rain can reduce control due to mix of oil and water, while heavy rain can wash these away but still poses hydroplaning risk. Friction varies with surface roughness, impacting vehicle handling.
Step-by-step explanation:
The statement is false. Driving in the 'tracks' left by the vehicle ahead can reduce the risk of hydroplaning, but it does not eliminate the possibility entirely. When cars leak oil and gasoline, these substances accumulate on the road surface. During a light rain, this mixture can create a slippery layer, leading to a loss of control of the car. A heavy rain can wash away these substances, potentially improving traction, but as roads become wetter, the risk of hydroplaning still exists because a layer of water can build up between the tires and the road surface, leading to a loss of friction and increased stopping distances. It is crucial for safety to understand that while certain conditions may reduce the risks, attentive driving and maintaining a safe speed and distance from other vehicles are still necessary to prevent accidents.
Aside from driving conditions, it is generally desirable to have more friction in many situations. For example, athletic shoes are designed to provide more friction to prevent slipping during sports activities.
Friction truly varies with different surfaces due to variations in roughness or smoothness. This concept is important to understand when predicting vehicle handling and safety on different driving surfaces.