A doubt about frictional forces

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SUMMARY

The discussion centers on the concept of frictional forces as described in Serway's physics book. It clarifies that the direction of kinetic friction is always opposite to the relative motion between two surfaces, while static friction acts against impending motion. A specific example involves a crate on a truck, where friction acts in the direction of the truck's acceleration despite the crate not sliding. The conversation also addresses the complexities of rolling friction, particularly in relation to car tires and their interaction with the road surface.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with static and kinetic friction concepts
  • Knowledge of acceleration and its effects on objects
  • Basic principles of rolling motion and tire dynamics
NEXT STEPS
  • Study the differences between static and kinetic friction in detail
  • Explore the concept of rolling friction and its applications in vehicle dynamics
  • Learn about the coefficient of friction and its role in motion analysis
  • Investigate real-world examples of friction in automotive engineering
USEFUL FOR

Students of physics, automotive engineers, and anyone interested in the mechanics of motion and frictional forces.

  • #31
tiny-tim said:
Does that make sense now?

Yes it does now. So it is desirable to have driving tyres with high static frictional coefficient
and low rolling frictional coefficient.

I am currently reading "Engineering Mechanics - Statics, R.C. Hibbeler, 12th Edition"
and I think engineers probably understand these concepts better than the physicists.
For example, there treatment of topics like "Free body Diagram" is far better than physics
textbooks like Serway or Halliday & resnick... which is not surprising since for engineers
understanding mechanics is part of there bread and butter...
 

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