Driving Towards a Wall, Should You Stop or Turn?
<p>If we use the normal model for the static friction force, then the following would be true.</p>
<p>Of course the static friction force is a force of constraint — it has whatever value is needed to prevent the two surfaces from sliding with respect to each other. However, there is a maximum limit to the static friction force (that’s why there’s the less than or equal to sign). Since we want the car to stop in the shortest distance, we need the maximum friction. We can just use a normal equal sign here.</p>
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