If time compressed played a major role, locking your slide back on a pistol will wear the recoil spring out in 40-50 minutes. Think about it, its about 1/1200th of a second to cycle, so 50,000 rounds between spring changes....thats something like 42 minutes of compression.

 

I can assure you that locking the slide back on your pistol for 42 minutes will not wear it out. It is compressing/decompressing. Same with mag springs.

Really guys? An argument about a mall ninja? WTF!

 

Hooke's law

From Wikipedia, the free encyclopedia

Hooke's law models the properties of springs for small changes in length

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Prof. Walter Lewin explains Hooke's law, "arguably the most important equation in physics", in MIT's Course 8.01[1]

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A test of Hooke's law (MIT OCW)[2]

 

In mechanics, and physics, Hooke's law of elasticity is an approximation that states that the extension of a spring is in direct proportion with the load applied to it. Many materials obey this law as long as the load does not exceed the material's elastic limit. Materials for which Hooke's law is a useful approximation are known as linear-elastic or "Hookean" materials. Hooke's law in simple terms says that strain is directly proportional to stress.

 

Mathematically, Hooke's law states that

 

F=-kx

 

where

 

x is the displacement of the spring's end from its equilibrium position (a distance, in SI units: meters);

F is the restoring force exerted by the spring on that end (in SI units: N or kg·m·s-2); and

k is a constant called the rate or spring constant (in SI units: N·m-1 or kg·s-2).

 

When this holds, the behavior is said to be linear. If shown on a graph, the line should show a direct variation. There is a negative sign on the right hand side of the equation because the restoring force always acts in the opposite direction of the displacement (for example, when a spring is stretched to the left, it pulls back to the right).

 

Hooke's law only holds for some materials under certain loading conditions. Steel exhibits linear-elastic behavior in most engineering applications; Hooke's law is valid for it throughout its elastic range (i.e., for stresses below the yield strength). For some other materials, such as aluminium, Hooke's law is only valid for a portion of the elastic range. For these materials a proportional limit stress is defined, below which the errors associated with the linear approximation are negligible.

 

Rubber is generally regarded as a "non-hookean" material because its elasticity is stress dependent and sensitive to temperature and loading rate.

 

Applications of the law include spring operated weighing machines, stress analysis and modelling of materials.

 

k is the spring CONSTANT, not the spring VARIABLE.

But, what about pointed sticks?

Funny picture my friend sent me.

 

Great pic