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Author Topic: Simple Harmonic Motion (SHM)  (Read 5980 times)
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Fu-Kwun Hwang
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on: January 30, 2012, 09:20:58 am »

This is a simulation for simple harmonic motion:
F=m \frac{dv}{dt}=-k*x;

For the purpose numerical calculation, the above second order differential equation is transformer into two equations (first order differential equation):
\frac{dx}{dt}=v_x // use this equation to calculate x(t+dt) from x(t) and v_x(t)
\frac{dv_x}{dt}=-k*x/m // use this equation to calculate v_x(t+dt) from v_x(t) and x(t), k, m

With two initial conditions: x(0) and v_x(0), the rest of x(t) and v_x(t) can be calculated.
  

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