Physics on Coefficient of Friction

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SUMMARY

The discussion focuses on calculating the coefficient of friction (μ) for a block resting on a board inclined at a 15° angle. The equation μ = Fk / Mg is central to the problem, where Fk represents the force of kinetic friction and Mg is the gravitational force acting on the block. Participants emphasize the importance of drawing a free body diagram (FBD) to visualize the forces acting on the block, particularly the force parallel to the incline and the opposing frictional force.

PREREQUISITES
  • Understanding of basic physics concepts, particularly forces and friction.
  • Familiarity with free body diagrams (FBD) for visualizing forces.
  • Knowledge of trigonometric functions related to angles in physics.
  • Basic algebra skills for manipulating equations.
NEXT STEPS
  • Study the principles of static and kinetic friction in physics.
  • Learn how to construct and analyze free body diagrams (FBD).
  • Explore the relationship between angle of inclination and frictional forces.
  • Practice solving problems involving inclined planes and friction coefficients.
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and friction, as well as educators looking for effective teaching strategies in these topics.

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Homework Statement



What is the coefficient of friction of a block resting on a board at a 15° angle to the horizontal.

Homework Equations


μ= Fk
Mg



The Attempt at a Solution



I'm very lost at where I find Fk or Mg...?


Thanks for help in advance.
 
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xflasn1p3rx said:

Homework Statement



What is the coefficient of friction of a block resting on a board at a 15° angle to the horizontal.

Homework Equations


μ= Fk
Mg



The Attempt at a Solution



I'm very lost at where I find Fk or Mg...?


Thanks for help in advance.

Welcome to the PF.

Start by drawing a free body diagram (FBD) of the block. What is the force down parallel to the board? The force of friction points back up parallel to the board, and opposes the force trying to slide the block down the board ramp.
 

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