Help with problems relating to Force and Motion with Friction

AI Thread Summary
To determine the smallest angle from the horizontal that will cause scrambled eggs to slide in a Teflon-coated skillet, the coefficient of static friction is crucial, with a value of 0.05. Initially, when the skillet is horizontal, gravity and the normal force cancel each other, preventing movement. As the angle increases, the gravitational and normal forces no longer balance, altering the net force direction and introducing friction into the equation. Understanding the relationship between these forces is essential for calculating the critical angle. The discussion emphasizes the importance of analyzing forces to solve problems involving friction and motion.
NYbikerkid
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The coefficient of static friction between Teflon and scrambled eggs is about 0.05. What is the smallest angle from the horizontal that will cause the eggs to slide across the bottom of a Teflon-coated skillet?

I don't know where to begin.. Can someone help me?!
 
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You need to think of all the forces acting, you have gravity, the normal force and friction.

When the skillet is horizontal, gravity is perpendicular to the skillet and so is the normal force (these two oppose each other). Therefore they cancel out and the egg remains stationary so friction plays no part.

As the angle from horizontal changes, the magnitudes of the gravitational force and the normal force no longer match, also they are not parallel. Therefore the direction of net force changes which implies friction will play a part.
 

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