00:01
So let us start with the concept which we are going to use here for this question.
00:06
So according to newton's law, the summation of the force along the horizontal or vertical is equal to zero.
00:14
So let's have a look to the figure first.
00:17
So this is what the figure in which you can clearly say that a 900 newton of force is applied at this point.
00:23
So basically this p representing the collar while this a representing the roller here.
00:31
So by the means of this diagram, we need to find the reaction at point a and reaction at point b.
00:39
So for that first of all, if we draw the free bird diagram, so at point b, the reactions will be given by one will be the rb cosine of 45.
00:53
Second will be so rb will be exerting like this that is normal to the surface.
00:58
So it will have the two components.
01:00
One will be rb cosine of 45 degree and one will be the perpendicular component that is rb sine of 45 degree.
01:10
While at this point we are given already the forces so no need to indicate.
01:14
While at point a there will be only single reactions that is which will be basically horizontal to this point and it is denoted by the a.
01:25
So for the rod to be in equilibrium, the sum of all the forces along the vertical should be equal to zero.
01:35
And hence in that condition we can state that the r sine of 45 this should be equal to the 900.
01:43
That is this vertical force will be balanced by this 900 sub newton force...