00:01
Here using method of section, consider the following section abc.
00:11
This is the section abc.
00:18
Here the length ab is 4 meter and here the length bc is equal to 1 .5 meter.
00:25
We have obtained this value by similarity.
00:30
And here this is angle theta here.
00:33
We know that here there is a 48 kilo newton acting at a point a.
00:40
So from the diagram we can see here angle theta will be equal to tan inverse of opposite side which is 1 .5 meter divided by adjacent side which is 4 meter.
00:51
Upon solving we will get a value of theta to be 20 .556 degree.
00:59
Now for the equilibrium condition we must know that a total force along the vertical direction that is f y is equal to zero and total force along the horizontal direction that is sigma f x is also equal to zero now considering the vertical direction here we have force fac c sine theta is equal to here the vertical force is 48 kilo newton or we can say that here f ac c is equal to 4.
01:35
48 kilo newton divided by sine theta here is 20 .556 degree...