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Easy Java Simulations (2001- ) => Dynamics => Topic started by: Fu-Kwun Hwang on April 12, 2009, 05:58:29 pm



Title: Spring connect two objects in graviy field
Post by: Fu-Kwun Hwang on April 12, 2009, 05:58:29 pm
Two objects with mass m1 and m2, connected with a spring (spring constant k).
You can drag the top one and compress it.
What is the minimum force (Fext) to bring the mass m1 jump up?
You can drag Fext to compress the spring,too!

If L0 is the original length of the spring.
The equilibrium poisition y1=y2+L0-m1*g/k;
F1=m(d2y1/dy12)= -k*(y1-y2-L0)-b*vy1;

Is it fun to play with it?