《理论力学》课程教学资源（PPT课件，英文）Chapter 04 Friction（上海交通大学：王晓君）

THEORY MECHANICS1902Electronic teaching planFrictionChapter4College of Mechanical andVehicle Engineering王晓君

THEORY MECHANICS Electronic teaching plan Chapter4 Friction College of Mechanical and Vehicle Engineering 王晓君

Engineering problems-racing startWhy do racers rub their wheels againstthe ground before starting?

Engineering problems￾racing start Why do racers rub their wheels against the ground before starting?

Engineering problems-racing startW=mgma=FNWhy is thethinof racingstructurecarbefore and thick after? Are the wheels smallbefore and big after?

Why is the structure of racing car thin before and thick after? Are the wheels small before and big after? Engineering problems￾racing start

Friction in engineering5m60°

Friction in engineering

Friction in engineeringa

Friction in engineering

Friction in engineeringRWsineWcose9

Friction in engineering

Friction in engineering

Friction in engineering

Friction in engineeringLMM?

Friction in engineering

Microscopic mechanism offriction

Microscopic mechanism of friction

Static slidingfrictionSliding frictionDynamic slidingfrictiorFrictionStaticrollingfrictionRolling frictionDynamic rollingfrictionPGD粘着点

Sliding friction Rolling friction Static sliding friction Dynamic sliding friction Friction Static rolling friction Dynamic rolling friction