Friction on an Inclined Plane: Kinetic or Static?

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SUMMARY

The discussion centers on the frictional forces acting on a car traveling downhill without acceleration. It establishes that if the tires are rolling without slipping, static friction is the dominant force. Conversely, if the tires slip against the surface, kinetic friction is present. The conclusion emphasizes the importance of the tire's interaction with the ground in determining the type of friction at play.

PREREQUISITES
  • Understanding of basic physics concepts, particularly friction.
  • Familiarity with the definitions of static and kinetic friction.
  • Knowledge of motion dynamics, specifically rolling motion.
  • Ability to analyze forces acting on objects in motion.
NEXT STEPS
  • Study the principles of static and kinetic friction in detail.
  • Explore the concept of rolling motion and its implications on friction.
  • Learn about the equations of motion for objects on inclined planes.
  • Investigate real-world applications of friction in automotive engineering.
USEFUL FOR

Students studying physics, educators teaching mechanics, and automotive engineers interested in vehicle dynamics and frictional forces.

stakar11
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Homework Statement


Does kinetic friction and static friction act upon a car traveling downhill (without acceleration by the car)?


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The Attempt at a Solution


Is it kinetic because the wheels rub against the surface and the car is in motion? But is it also static because the wheels are rolling downhill and at each point in time the wheels are stationary in their contact with the ground?
 
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It's one or the other, but not both. If the tires slip against the surface, it's kinetic friction; if the tires roll without slipping, it will be static friction.
 
Thanks, that helped a lot!
 

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