What Factors Influence Frictional Force in Different Scenarios?

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SUMMARY

Frictional force is a macroscopic effect resulting from atomic-scale electromagnetic forces, influencing the velocity of objects and decreasing total energy due to its nonconservative nature. There are two primary types of friction: dry and fluid. Dry friction is affected by the roughness of surfaces and the normal force, while fluid friction is influenced by factors such as viscosity, density, cross-sectional area, body shape, angle of incidence, and velocity, particularly at high speeds where it is proportional to the square of the velocity.

PREREQUISITES
  • Understanding of macroscopic and microscopic physical forces
  • Knowledge of dry and fluid friction principles
  • Familiarity with viscosity and density concepts
  • Basic physics of motion and energy conservation
NEXT STEPS
  • Research the mathematical modeling of frictional forces in physics
  • Explore the effects of surface roughness on dry friction
  • Study the impact of fluid viscosity on fluid friction
  • Investigate the relationship between velocity and fluid friction in high-speed scenarios
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Physics students, engineers, and anyone interested in understanding the dynamics of frictional forces in various scenarios.

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What is frictional force and its causes to increase or decrease?
 
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frictional force is a macroscopic effect of atomic size electromagnetic forses.
It usually causes the decreasion of the velocity and because of being a nonconservative force, has a path dependent integral. (I mean the work) and decreases the total energy of the body
 
There are two kinds of friction: dry and fluid. Dry friction increases with the roughness of the two surfaces in contact and the normal force between the surfaces.
Fluid friction depends on the viscosity and density of the fluid (air, water, oil,...), the cross section of the body perpendicular to the direction of movement, the shape of the body, the angle of incidence (angle between the velocity vector and the symmetry axis of the body) and to the velocity (for high speeds it is proportional to the square of the velocity).
 

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