00:01
So here in this question we have to draw the shear and the bending moment diagram for the given beam where we are given this beam.
00:07
This is the point a.
00:09
Let's say this is the point c.
00:11
Here is the point d and this is the point b.
00:15
So here the force is acting between the point a and c.
00:20
That force from here is equals to 30 kilo newton per meter.
00:25
So these forces are acting from the point a and c.
00:28
The force is acting equals to 60 kilo newton and let's say point a is attached to the mass and point b here mass is hanged from this point.
00:40
So the distance between the point a and c is given which is equals to 2 meter.
00:44
Distance between the point c and d is 1 meter and this point is 2 meter.
00:48
In this question what first we are doing is we have to take moment about the point b.
00:57
So the moment about the point b from here is given by the formula that is ra multiplied by the 5 is minus 30 which is multiplied by the 2 multiplied by the 2 divided by 2 plus 3 minus cos of 2 that is equals to 0.
01:17
So this is basically the term from here point a, point c, point d force of 60 kilo newton acting here force of 30 kilo newton is acting here.
01:31
Here is the point b.
01:33
Distance is 2 meter, 1 meter and this distance from here is equals to 3 meter.
01:38
So this is the in this term we get the value of ra that become equals to 72 kilo newton.
01:45
Now we are taking the moment about the point a.
01:49
So when we take moment about point a then we are considering that summation of ma in this case is equals to 0.
01:59
So equation from here will be rb multiplied by the 5 plus this is the total length minus 60 multiplied by the 3 force is acting 60 newton on the point d and the distance will become equals to 3 minus 30 on the point a multiplied by the 2 multiplied by the 2 divided by 2 that is equals to 0.
02:21
So from here we get the value of rb that is equals to 48 kilo newton.
02:26
So we are considering about the chalk.
02:29
So the total load on the beam from here is equals to ra plus rb.
02:38
So this from here become equals to 30 multiplied by the 2 plus 60 is equals to 72 plus 48.
02:45
So we are checking this equation from here.
02:47
This become equals to 120 kilo newton and this 2 from here is equals to 120 newton.
02:53
Hence our assumption or our calculation is correct.
02:56
So the diagram from here will be somewhat like this.
03:00
Let's say this is the 42 kilo newton from here.
03:04
It is decreasing in this way then from that point this is straightly from that point this point from here is 12 kilo newton and from here it is decreasing taking a rectangular shape positive point and negative in this case which is equals to 48 kilo newton.
03:26
So this is the value from here...