Physics on Coefficient of Friction

AI Thread Summary
To find the coefficient of friction for a block on a 15° inclined board, a free body diagram (FBD) is essential. The force acting down the board is determined by the component of gravity parallel to the incline, while the frictional force opposes this motion. The equation μ = Fk/Mg can be used, where Fk is the frictional force and Mg is the gravitational force acting on the block. Understanding these forces will clarify how to calculate the coefficient of friction. A clear analysis of the forces involved is crucial for solving the problem.
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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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