SHM- Problem with negative signs

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    Negative Shm
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SUMMARY

The discussion focuses on the role of negative signs in Simple Harmonic Motion (SHM), specifically in the equation mx'' = -kx. The negative sign indicates that the restoring force, as described by Hooke's Law, acts in the opposite direction to the displacement from the equilibrium position. This relationship ensures that if the displacement x is positive, the force exerted is negative, and vice versa. The negative sign is clarified as not being a part of the constant k, but rather a crucial aspect of the force's directionality.

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  • Familiarity with Hooke's Law
  • Basic knowledge of differential equations
  • Concept of equilibrium in physics
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annms
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I have problems understanding the use of negative signs in SHM. ie. mx''=-kx

Why is there a negative sign for the constant k and what does the negative sign mean?
 
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The negative sign in Hooke's law tells you that the force is opposite to the displacement from equilibrium. If x is positive, then the force is negative. And vice versa.

The negative sign is not part of the constant k.
 

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