00:01
From the given data, we can conclude that here the value of m is 1, the value of k is 20 and the value of c is equal to 8.
00:13
Now we have for the given problem, the differential equation m double derivative of x, that is x double dash plus c x dash plus kx equal to 0.
00:30
Now substituting the values we get x double dash plus 8x dash plus 20 x equal to 0.
00:42
Now we have the value of the auxiliary equation as let us say n square plus 8 n plus 20 equal to 0.
00:58
So this is the auxiliary equation.
01:00
Now the roots of the auxiliary equation will be given by the minus 8 plus minus under root of 8 square minus 4 multiplied by 20 divided by 2 which is equal to minus 8 plus minus 4 i divided by 2 using the quadratic formula which will be equal to minus 4 plus minus 2i.
01:27
So now we have got the roots of the auxiliary equation.
01:32
We can conclude that the values x of t will be equal to e -rest 2 -2 minus 4 t into bracket 4 cos of 2 t plus c1 cos of 2 t plus c2 sign of 2 t as we have got the roots of auxiliary equation as complex conjugates that is complex numbers.
02:00
We have the value of x of t as stated above.
02:04
Also we have x of 0 is equal to 0 .5...