My Math Forum  

Go Back   My Math Forum > Science Forums > Physics

Physics Physics Forum

LinkBack Thread Tools Display Modes
March 28th, 2014, 04:16 PM   #1
Joined: Mar 2014
From: Queensland

Posts: 1
Thanks: 0

Equilibrium Or so I think

I am trying to understand this question, I have tried multiple different 'ideas' to get the answer but I keep getting stuck due to the fact that well there is very little data, so somehow I need to get the info but i don't know how.

The right-angle uniform slender bar AOB has mass m. If friction at the pivot O is neglected, determine the magnitude of the normal force at A and the magnitude of the pin reaction at O.

If someone could please explain this to me.

Attached Images
File Type: jpg Capture.JPG (12.5 KB, 2 views)
ItsCathingMe is offline  
April 16th, 2014, 07:29 AM   #2
Senior Member
Joined: Apr 2014
From: Glasgow

Posts: 2,037
Thanks: 674

Math Focus: Physics, mathematical modelling, numerical and computational solutions
When doing problems such as these, the first step is to always put the forces on the diagram. Remember that although the frictional force at O is neglected, this doesn't mean that the frictional force at A is!

Also, think about:
i) what kind of forces are acting in the problem (weight? friction?)
ii) how all the linear forces add up as a whole (after specifying which direction you want to be positive, all horizontal forces must sum to zero and all vertical forces must sum to zero)
iii) how all the moments contribute as a whole

After you follow these steps, the problem should be a bit easier. It is probably also safe to assume that the bar has a uniform density and therefore has its mass distributed evenly across the bar.

I hope this helps! If you are still stuck, I can provide an answer for you.
Benit13 is offline  
April 21st, 2014, 02:16 AM   #3
Joined: Apr 2014
From: Capella

Posts: 1
Thanks: 0

Math Focus: Triginometry
Hi there,
Are you able to provide further information to this problem? Maybe an example of a similar question with different values?
munta is offline  

  My Math Forum > Science Forums > Physics


Search tags for this page
Click on a term to search for related topics.
Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Equilibrium Points arron1990 Calculus 4 June 5th, 2012 12:44 AM
Thermal Equilibrium rnck Physics 3 June 15th, 2011 06:55 AM
Equilibrium Evil Tomato Physics 2 December 8th, 2010 01:35 PM
Equilibrium Francesco Mureddu Economics 4 September 27th, 2010 02:49 PM
Equilibrium Francesco Mureddu Calculus 1 August 24th, 2010 05:09 PM

Copyright © 2017 My Math Forum. All rights reserved.