M1 Mechanics - Moments?

Hi.

I was trying out some questions on Moments, and I just cannot hack this one in particular!

Any help please?

(sorry for the bad quality)

What have you tried/what are your thoughts?

Well so far, I've just ignored the particle of weight and I've calculated the reaction forces, where C = 100N and D = 120N. From here I just have no idea on what I should do. D:

Well so far, I've just ignored the particle of weight and I've calculated the reaction forces, where C = 100N and D = 120N. From here I just have no idea on what I should do. D:

Resolve at specific points of the rod?

OK, there wasn't really any need to do that.

I suggest you first draw your own diagram with a point "E" marked on it for the particle to make things clearer.

Then resolve vertically to get the magnitude of the reactions at C and D in terms of W.

Make sense? See if you can go on from there.

Thank you so much! I've just tried doing it your way, but this is what I've managed to end up with... somehow. o_O

I know your method is right but I know I've gone wrong somewhere. Can you please show me my error?

No, you resolve all the forces acting vertically on the rod. It is in equilibrium so there cannot be a net force. You need not worry about their point of application because in equilibrium there will be no unbalanced moment, either.

That is what you initially do, then you resolve around a specific point, refer to the latest post on the thread, those equations that he has displayed, those can only be achieved by resolving clockwise and anticlockwise at a point on the rod

I take it you now understand what you have to do, just remember to always take moments about the same point

Again, thank you everyone who took their time out to help me. Unfortunately, I've STILL got it wrong (by this point half the internet world screams in frustration and agony to my lack of intelligence regarding Moments ¬_¬) but it's most likely due to how I've approached the question.

It makes no sense! Usually I'm good at this topic, but this question alone has made me change my mind. -_-

I will keep practising, I may also ask my teacher for help. Thank you all once more for helping me out.