Recent content by nneutrino

1. I already have simulation of a pendulum with rod but my problem is how I have already said elastic pendulum with spring. 2. Yes, I have full set of equations and I find it useless to write them all here. So I am asking for order of those equations in my code (I know how programing in Matlab...

Hi guys, I need to transform Newtonian solution of motion equation for spring (elastic) pendulum into Matlab or Microsoft Excel. I want to use Euler´s Method (or Runge Kutta Method) of numerical solution for that problem. I know all the equations but I have a problem with making some code from...

Hi, Can you help me to find out appropriate numerical model of calculating position depending on time of special pendulum. It is basically gravity pendulum but we have a spring instead of rod. (picture)

When we have solid rod instead of spring I can solve this problem in Microsoft Excel either with Euler´s method or Runge Kutta method, but that spring makes this problem hard for me.

Great! Thanks a lot for explanation :smile:. Edit (fresh_42): The rest of the post has been deleted, because it belongs to a separate thread.

Thanks for answer :smile:. Basically is it correct when I use α=-g/L*φ; T=2π*sqrt(L/g) for small amplitude where sinφ=φ and α=-g/L*sinφ; T=2π*sqrt(L/g)*(1+(1/16)*φ*φ+(11/3072*φ*φ+...) for large amplitudes? α-angular acceleration; g-gravitational acceleration; L- length of rope; φ- angle; T- period

Hi, I would like to ask what is the formula for non-harmonic oscillation of pendulum? I know that formula for harmonic oscillation of pendulum is: (d^2 φ)/(dt^2 )+g/r sinφ=0 where φ is angle, t is time, g is gravitational acceleration, r is length of a rope. I know that harmonic oscillation...