00:03
Okay, so your question is a torque problem.
00:08
May not look like a torque problem when we first look at it because it's just a beam that's not moving.
00:13
We have two supports that are holding it up each on one end.
00:20
But what's really happening is on the left side, there's this 120 newton force that's trying to rotate the beam around its center point.
00:32
To a clockwise direction.
00:34
So it's trying to rotate it around like a clock.
00:38
While on the y side, on the right side, we've got the opposite happen.
00:43
We've got 120 newton force that's trying to cause it to rotate counterclockwise.
00:48
Well, because they're both equal to each other in torque, there is no movement.
00:54
There's no rotation.
00:56
So i put down the basic idea of what's happening.
00:59
Torque x must equal torque y and how we would find each of them is taking the force times the distance from the center point.
01:10
They both have the same r value at first because they're both equally distant from each other in terms of the center point.
01:19
They're on the edges.
01:22
Now notice that i made one of the torques negative because it's trying to cause a rotation in the opposite direction from the other.
01:30
Or so i usually say counterclockwise is negative.
01:34
As long as one direction is considered negative and the other one positive, we'll always have values that are true.
01:45
So the second scenario, once we have that set up, and i don't know if some of the stuff got cut off or didn't get cut and pasted over because i'm not thinking i have all the information.
01:58
So i'm making a bit of a guess here.
02:00
It didn't include the drawings.
02:02
If there were drawings.
02:03
So i'm going to be guessing a little bit here.
02:07
But it looks like what's happening in the story problem is that the force that was at the x position is now moved in closer to the center point at z.
02:20
So i drew that and i labeled it with a distance r2.
02:25
And i kept the other one as the same distance, but i'm going to label it as r1 to keep them separate...