00:02
Hello, so the two external forces are 500 nm at 6 m and 300 nm at 3 m.
00:18
Since there is roller support at a, it can provide only vertical reaction.
00:30
That is, let's say r and the pin support at b, it will provide vertical reaction that is, let's say rb and horizontal reaction that is hb.
00:51
Now, we will use the equilibrium equation since summation of forces in x direction, it should be equals to hb that is 0 since there are no horizontal forces acting on the pin.
01:11
So, it will equals to 0 and in y direction, summation of forces in y direction, this should be equals to reaction at a plus vertical reaction at b and this should be equals to, sorry, reaction at a plus reaction at b minus 500 minus 300 and this should be equals to 0 because we are taking moments about point a that is 0...