From a differential equations course: A mass that weight 6 lb stretches a spring 1in. The system is acted on by an external force 11* sin⁡(19.5959*t) lb.   If the mass is pushed up 4 in and then released, determine the position of the mass at any time t. Use 32ft/s2 as the acceleration due to gravity. Pay close attention to the units. NOTES: Answer should be a function u(t).  The 'guess' when using the method of undetermined coefficients is: t(A*cos(19.5959*t) + B*sin(19.5959t)). I just have not been able to finish the MUC part to find the particular soluton to the Non-Homogeneous Equation. The general solution to the homogeneous equation is: u_c = C1*cos(19.5959t) + C2*sin(19.5959t)

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From a differential equations course:

A mass that weight 6 lb stretches a spring 1in. The system is acted on by an external force 11* sin⁡(19.5959*t) lb.

 

If the mass is pushed up 4 in and then released, determine the position of the mass at any time t. Use 32ft/s2 as the acceleration due to gravity. Pay close attention to the units.

NOTES:

Answer should be a function u(t). 

The 'guess' when using the method of undetermined coefficients is: t(A*cos(19.5959*t) + B*sin(19.5959t)). I just have not been able to finish the MUC part to find the particular soluton to the Non-Homogeneous Equation.

The general solution to the homogeneous equation is:

u_c = C1*cos(19.5959t) + C2*sin(19.5959t)

 

 

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