Coefficient of friction of a block on a spring

AI Thread Summary
To find the coefficient of kinetic friction for a 4.3 kg block being pulled by an 89 N spring at an angle of 15 degrees above the horizontal, a Free Body Diagram (FBD) is essential. The FBD will help visualize the forces acting on the block, including the spring force and the normal force. The equation Fk = μkN relates the kinetic friction force to the normal force, which needs to be calculated considering the spring's angle. Understanding how to resolve the spring force into its horizontal and vertical components is crucial for determining the normal force. A clear approach using the FBD will simplify the problem-solving process.
CSwitzer
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Homework Statement


Find the coefficient of kinetic friction between a 4.3- block and the horizontal surface on which it rests if an 89 spring must be stretched by 2.3 to pull the block wi`th constant speed. Assume the spring pulls in a direction 15 above the horizontal.


Homework Equations


Fk = \mukN


The Attempt at a Solution


I'm completely lost on this one, I don't understand how to find anything with the spring to convert it to a Normal force.
 
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Include some units in your problem statement so that it is clearer.

For almost any physics problem, start with a Free Body Diagram. In this case, draw the FBD of the block and plot all the forces acting on it. This should make it much easier to understand what you need to do next.
 

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