Understanding Friction and Normal Force on Inclined Planes

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SUMMARY

The discussion clarifies the distinction between normal force and frictional force on inclined planes. The normal force acts perpendicular to the surface, while frictional force opposes the motion down the incline. The maximum frictional force is calculated as the product of the normal force and the coefficient of static friction. For instance, with a friction coefficient of 0.5, the frictional force equals 0.5 times the normal force, emphasizing that normal force does not equate to frictional force.

PREREQUISITES
  • Understanding of basic physics concepts such as force and motion.
  • Familiarity with inclined planes and their mechanics.
  • Knowledge of static friction and its coefficient.
  • Ability to perform calculations involving forces and coefficients.
NEXT STEPS
  • Study the principles of Newton's laws of motion.
  • Learn about calculating forces on inclined planes using free-body diagrams.
  • Explore the concept of kinetic friction and its differences from static friction.
  • Investigate real-world applications of friction in engineering and design.
USEFUL FOR

Students of physics, educators teaching mechanics, and anyone interested in understanding the forces acting on objects on inclined surfaces.

stupif
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can i say normal force acting on the object perpendicular to the surface is the frictional force??
because if the normal force is great enough, the object will not slide down...so, can i say frictional force is normal force?

help me...thank you
 
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Friction force would be opposing gravity, in the direction of the inclined plane's surface. The normal force perpendicular to the plane times the coefficient of static friction determines the maximum frictional force before sliding occurs.
 
no, you cannot say that the normal force is the frictional force...typically, the frictional force is , say, a percentage of such force's magnitude...

for example, if a surface has a 0.5 friction coefficient, then the frictional force is 0.5xnormal_force

then again, if you are on a surface with zero friction coefficient, the normal force is still there, but there is no friction.
 

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