In: Advanced Math
A spring with a spring constant 4 N/m is loaded with a 2 kgmass and allowed to reach equilibrium. It is then displaced 1 meter downward and released. Suppose the mass experiences a damping force in Newtons equal to 1 times the velocity at every point and an external force of F(t)=4sin(3t) driving the system. Set up a differential equation that describes this system and find a particular solution to this non-homogeneous differential equation:
spring constant
mass
damping force in Newtons equal to 1 times the velocity
so damping constant is
external force is
.
DE is given by

....................differential
equation for this system
.
in question mention that, find an only a particular solution
.
here we have
so assume that particular solution is
....................(1)


.
put all values in DE


.

.

.

compare coefficient both sides

....................put
both constants in equation 1
.


......................
particular solution