What is dynamic equilibrium in laymen's terms?

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SUMMARY

Dynamic equilibrium refers to a state where an object, such as a 2.0 kg wood box, moves at a constant speed without any acceleration. In this scenario, the net force acting on the box in the vertical direction is zero, despite the box sliding down a vertical wood wall at a 45-degree angle. The coefficient of kinetic friction between wood surfaces is μk = 0.200, which plays a crucial role in determining the required applied force to maintain this constant speed. Understanding dynamic equilibrium is essential for solving similar physics problems involving forces and motion.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Knowledge of forces and friction, specifically kinetic friction
  • Basic trigonometry for resolving forces at angles
  • Familiarity with free body diagrams
NEXT STEPS
  • Study the concept of static vs. dynamic equilibrium in physics
  • Learn how to calculate net forces in two-dimensional motion
  • Explore the effects of different coefficients of friction on motion
  • Practice problems involving free body diagrams and force resolution
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Students studying physics, educators teaching mechanics, and anyone interested in understanding motion and forces in real-world applications.

meglynj
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I was receiving help for the following problem...

The 2.0 kg wood box in the figureslides down a vertical wood wall while you push on it at a 45 ∘ angle. The coefficient of kinetic friction of wood on wood is μk = 0.200. What magnitude of force should you apply to cause the box to slide down at a constant speed?

And I was told to set the F(net) of the y-axis to 0 because the box is in dynamic equilibrium.
What exactly does dynamic equilibrium mean? I want to understand so I'll know to use it in a different problem.
 
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Dynamic equilibrium means no accelerations, even though the box is moving.

The sum of the forces in each direction should be zero.
 

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