What Are Common Misconceptions About Newton's Laws of Motion?

[pgardn]

This misconception arises, I think, because it is tempting to ask the 'how does it know?' question. When you push an object, there is always a transitional time, during which the two surfaces (your finger and the ball) deform until the (N3 pair of) forces reach a final value. The same sort of 'how does it know?" question is often asked about the currents and voltages around an electrical circuit. They are only there after a certain transitional delay, during which the various circuit elements respond to their individual situation

Yep.

 

[berkeman]

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