Welcome to module four of Applications in Engineering mechanics.

Today's learning outcome is to apply the 2D

equilibrium equations to solve a real world problem.

We're going to do a frame problem.

This is a frame, it's not exactly the same but it's, it's very much like a

frame structure of my, stepladder that I've used

several times as an example in this course.

[SOUND].

So, in this problem we have 150 Newton force, or applied at pin B, we

have the, the weight of the structure to

be considered negligible with no, with no weight.

And we have the question of finding the force exerted at point B by.

On to member ABD.

And so what do you, what should you do first to solve this problem?

I'd like you to think about that.