Jan 14, 2006, 05:07 PM

I found a website (http://www.myphysicslab.com) that shows examples of 2D physics systems for a number of objects like springs and rigid bodies. It also explains things with some equations.

I'm currently trying to reproduce the single spring in my program (just learning some physics) but I am a bit rusty on differentials. I took very little calculus so I'm not very good with figuring out some of the things.

When it says

x'' = -k/m*x - b/m*x'

is that the same as

a = -k/m*x - b/m*v?

If so could I handle the position as follows (I intialized x = 4 and v = 0)?

Thanks for any help.

I'm currently trying to reproduce the single spring in my program (just learning some physics) but I am a bit rusty on differentials. I took very little calculus so I'm not very good with figuring out some of the things.

When it says

x'' = -k/m*x - b/m*x'

is that the same as

a = -k/m*x - b/m*v?

If so could I handle the position as follows (I intialized x = 4 and v = 0)?

Code:

` float m = .5; //mass`

float R = 2.5; //length of spring at rest

float k = 3; //spring stiffness

float b = .1; //damping constant

float a = -(k/m) * x - (b/m) * v;

v += a;

x += v;

Thanks for any help.