What does the size of adhesion mean in Subject 4?

[Cindy]

Subject 4 adhesion refers to the adhesion condition between tires and the road surface. The size of adhesion is the product of vehicle weight and the road surface adhesion coefficient. This applies to the entire vehicle. For a single wheel, the adhesion of that wheel should be: the vertical reaction force from the ground on that wheel multiplied by the road surface adhesion coefficient. Below is the relevant introduction: 1. Definition of Subject 4: Also known as Subject 4 theoretical test or driver theory test, it is part of the motor vehicle driver's license assessment. 2. Content of Subject 4: The test paper consists of 50 questions, mainly in the form of cases, pictures, animations, etc., with a full score of 100 and a passing score of 90.