00:01
In this problem, we have been given that there is a horizontal beam and this horizontal beam is having a mass of 180 kg.
00:09
And here there is a piano that's resting at a distance of one quarter from this point a.
00:17
So one quarter of this length of the complete rod.
00:21
So let's consider the length of the complete rod as 4l.
00:25
So in that case, the distance from a will be l and the distance from b will be 3l.
00:30
And also here, the weight of this piano, that will be 300 times 9 .8, which is 2940 newtons.
00:40
And the weight of this beam will act at the center of mass, which is at a distance to l from, let's say, point a.
00:48
So that will come out to be 1764 neutens.
00:53
And we have to determine the reactions are the magnitude of the vertical force at these two supports, a and b.
01:01
So let's consider the magnitude of the reaction forces to be a and b respectively as indicated here...