Using Newton's laws to solve problems

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SUMMARY

The discussion focuses on solving a physics problem involving Newton's laws, specifically regarding the motion of a box being pushed across a floor with a coefficient of friction of 0.41. The key challenge is determining the angle theta at which the box can no longer be moved, despite the applied force. Participants emphasize the importance of creating a Free Body Diagram (FBD) and resolving the pushing force into its X and Y components to calculate the normal force and frictional force effectively.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Ability to create and interpret Free Body Diagrams (FBD)
  • Knowledge of frictional force calculations
  • Basic trigonometry for resolving forces into components
NEXT STEPS
  • Study the principles of static and kinetic friction in detail
  • Learn how to construct and analyze Free Body Diagrams (FBD)
  • Explore the mathematical relationship between force, angle, and friction
  • Investigate real-world applications of Newton's laws in mechanics
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in applying Newton's laws to solve practical problems in mechanics.

juliesangelcleo
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Homework Statement



"while moving in a homeowner is pushing a box across the floor at a constant velocity. The coefficient of friction is .41. The pushing force is directed in a downward motion at and angle of theta below the horizontal. When theta's value is greater then a certain value, then the box can not be moved, no matter the force. What is this theta.

I don't know how to start this one.
 
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You know that a FBD, and a list of potentially useful eqns is a great way to start. Assuming you have done that, what is the normal force here (the force with which the floor pushes back). From there its easy to get the frictional force. The push must of course be resolved into X and Y components.
 

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