Final answer:
The assertion that sliding traction is desirable in skiing but not in driving is correct. Skiers benefit from sliding traction for smoother movement, while drivers need more friction for safe vehicle control, especially on icy surfaces.
Step-by-step explanation:
The idea of sliding traction being desirable while skiing but not in driving is true. When skiing, a certain amount of sliding traction is beneficial for maneuverability, allowing skiers to glide over the snow and make smooth turns. Conversely, in driving, particularly on icy roads, a lack of traction can lead to loss of control. Therefore, tires designed for winter conditions enhance friction and grip, minimizing sliding traction, which helps prevent accidents.
According to the principles of friction and inclined planes, kinetic friction is indeed generally less than static friction, which explains why an object already in motion requires less force to keep it moving compared to the force needed to start the movement. The concept that different surfaces exhibit varying levels of friction due to their roughness or smoothness supports the use of winter tires on icy roads and illustrates why friction is essential for safe driving. On the other hand, reduced friction on snow allows skiers to maintain their motion with less effort.