00:01
So in this question we've been asked to apply the fourth order differential equation of the deflection cave.
00:08
So based on this, we are saying the elv, elv, looking at the fourth order, this is equal to negative q, which is equal to negative q0 sine pi x divided by l.
00:28
Then looking at third order, this is going to be equal to q0, l over pi, multiplied by cos pi x divided by l plus c1.
00:48
Recall that to move from the fourth order derivative to the third order derivative, all we need to do is to integrate the fourth order.
00:57
Then to move from the third order derivative to the second order derivative, we need to integrate the third order derivative.
01:08
And this gives us a second order derivative of sine pi x divided by l plus c1x plus c2.
01:19
So we want to determine these constants of integration.
01:24
And for us to do that, we are going to be applying boundary conditions.
01:29
So the first boundary condition, we know that the second derivative prime prime, it is equal to m.
01:37
And we are looking at a scenario where the elv second derivative at 0.
01:45
It is equal to 0...