00:01
We have to calculate force on each tusk.
00:06
Force on each member of the tusk.
00:09
Each member of tusk and we have also given that each bar is 10 feet long and the reaction force are given so this is the diagram of the tusk that we have in the question.
00:27
So one second this is the diagram so we have four or five components here.
00:37
Let's just say these are the components so we can name them this is point a, this is point b, this is point c, this is point d and this is point a and the respective reactions are also given like at a the reaction is given as 0 .5 kip and at point b the reaction is given as 1 .5 kips and at point c the reaction we have is 2k or we can say 2 kips.
01:17
K actually here is the significance to kips and it represents 1k is equal to 1000 lb.
01:24
So we have to calculate, we have to identify each member is in a compression or tension so and the angle obviously the angle are all equal so this is 60, this is 60 and this is 60.
01:40
Now if we talk about the joint a, if we calculate for joint a, for joint a we can see that all of the forces here so this is joint a and one force applied is here which is fae, one force is 60 degree which is fkb and a reaction force of 0 .5 k and this is 60 degree.
02:07
So from this diagram we can apply, we can sum all of the forces in horizontal and vertical to be 0.
02:15
So for the forces in vertical component this will be fab sin of 60 degree plus 0 .5 k is equal to 0.
02:26
So from here we can calculate fab it comes out to be minus 0 .577 k and this force basically fab is the compression force we can say and for force fae we can write horizontal force and take it to be equal to 0.
02:46
So this will be fae plus fab cos of 60 degree is equal to 0.
02:55
So fae it comes out to be, it will be minus 0 point sorry not minus it will be 0 .289 k and this force will be tension force...