00:01
Let's determine the magnitude of the pin's reactions at a, b and c.
00:19
By the weight of the uniform, so the m is equal to 6000 lb.
00:25
Now let's solve this question and find the answer.
00:30
So first we understand that the summation of fy which is equal to 0.
00:38
Here we can write the w2 plus w3 which is equal to 6000 lb.
00:49
Now here we can write summation of mw multiplied by t which is equal to 0.
00:59
So here we can write 6000 multiplied by lb multiplied by 1 .5.
01:07
And here we can write minus w2 multiplied by 4 .5 which is equal to 0.
01:15
We can simplify and write w2 which is equal to 2000 lb.
01:20
So here we can write w2 which is equal to 6000 minus w1.
01:27
And now the substitutive value which is equal to 6000 minus 2000.
01:33
So w2 which is equal to here answer is.
01:37
So here we can say not w2, here is w1.
01:43
So w1 which is equal to answer is 4000 lb.
01:48
Now here in the next step our target is to find the summation of fx.
01:54
So in that case we can write here the rbx minus we can write rex which is equal to 0.
02:04
So the rbx which is equal to we can write here by solving this we can write 5196 point.
02:16
And here we can write if we apply summation of fy which is equal to 0.
02:21
And here we can write ray plus we can write rby minus we can write w3 which is equal to 0.
02:31
And here we can write rby which is equal to we can write w2 minus we can write ray.
02:42
So the rby which is equal to answer is here we can write 5666 point 67 lb.
02:52
So here we can write summation of ma which is equal to 0...