Physics on Coefficient of Friction

[xflasn1p3rx]

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.

 

[berkeman]

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.