# Tag Info

Accepted

### Why is my simple RK4 failing to capture adequate spring deformation?

It's not your Runge-Kutta implementation: I reproduce your result. A quick-n-dirty Python implementation, using RK45 from ...
• 71.8k

### Why does a spring have potential energy compared to a rod?

In practice there is no such thing as a perfectly rigid rod. All rods compress to some extent, so they are like extremely stiff springs, but they are such stiff springs that you can ignore the ...
• 18.8k
1 vote

### Deflecting a belt under tension

I'm voting with your colleague. Everything comes down the the force it takes to deflect the belt at the point of contact, and since this is for a static situation, action equals reaction. The ...
• 2,831
1 vote
Accepted

### Fourier Component And Resonance

It means that the driving force is decomposed into sines and cosines and if one of this sinusoidal functions oscillates with frequency equal or close to the natural frequency, then the system ...
• 16.4k
1 vote
Accepted

### Units of measure do not match in spring formula

"$g$" is the acceleration due to gravity, with units of $\frac{m}{s^2}$. You may have confused it with the universal gravitational constant (represented by "$G$"), which has units ...
• 2,880
1 vote

### Work done by massless spring

For a massless spring the net force on the spring is zero, and there in no work done on the spring. But, the spring can do work on another body. See the example below; the spring does work on mass \$...
• 6,551

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