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M2 - Hinges

A uniform rod is hinged to a ceiling and is suspended at the other end by a light inextensible string connected to the ceiling.

Is the reaction at the hinge perpendicular to the rod and pointing away from the ceiling?

Reply 1

BabyMaths

Original post by maggiehodgson

No and no.

Would like to suggest a particular situation?

Reply 2

maggiehodgson

Original post by BabyMaths

No and no.

Would like to suggest a particular situation?

This is the question and my workings. I just don't get it yet do I.

Scan0017.pdf414.1KB

Reply 3

BabyMaths

Original post by maggiehodgson

This is the question and my workings. I just don't get it yet do I.

Apologies for my last post, which I have deleted. I hope it didn't waste your time.

Why do you say, "Clearly something's wrong"?

I believe that you're OK up to that point.

(edited 9 years ago)

Reply 4

BabyMaths

Original post by maggiehodgson

This is the question and my workings. I just don't get it yet do I.

Sorry, I only just saw the question at the top of your scan.

I'll take another look..

Edit:

I believe there is an error in the question.

T=W\sqrt{5}

is not possible.

(edited 9 years ago)

Reply 5

maggiehodgson

Well, isn't it the perpendicular force x length?

W is at 1/2 AB so it's a isn't it?
And T's 2a away from A.

It must be something obvious but I'm not getting it.