Friction compared to applied force

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SUMMARY

The discussion focuses on the relationship between friction and applied force on a horizontal surface during different motion states: slowing down, constant velocity, and speeding up. It is established that friction is modeled as a function of speed, either linearly or as the square of speed. The applied force, however, requires a more complex analysis, as it does not have a straightforward relationship with friction. A model of both forces must be developed to accurately compare them in various scenarios.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of friction force and applied force
  • Knowledge of basic physics equations related to motion
  • Ability to model physical forces mathematically
NEXT STEPS
  • Study the mathematical modeling of friction forces in physics
  • Learn about the dynamics of forces in motion using free-body diagrams
  • Explore the effects of speed on friction through experiments or simulations
  • Investigate the relationship between acceleration and applied force in different contexts
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Students studying physics, educators teaching mechanics, and anyone interested in understanding the dynamics of friction and applied forces in motion.

Shanetm
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Homework Statement



I am doing review questions about friction and am I little confused about the one I am currently doing. I have an idea of what the answer is but i want to be positive.

The question asks to compare friction to applied force of an object on a horzontal surface. Compare them when the object is slowing down, traveling at a constant velocity and speeding up

The Attempt at a Solution



I have the answers as both will decrease, both will stay the same and both will increase but I feel like this may not be correct. Help would be appreciated.
 
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Well the friction is usually modeled as a function of speed (either linear or as speed squared). So you are right about how friction will act in those situations.

But the applied force is a bit more complicated. I think you'd need to write down a model of the friction force and the applied force and work it out. (In other words, I don't think there is a general answer)
 

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