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May 26th, 2019, 01:30 AM  #1 
Senior Member Joined: Aug 2014 From: India Posts: 470 Thanks: 1  What is the total summation of moments at A ? What is the total summation of moments at A? I tried $\displaystyle \sum M_{A} = F.(d+d` )F(d+d` )F.d$ I am getting negative answer. 
May 26th, 2019, 01:45 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,969 Thanks: 2219 
Any force acting through A has a zero moment at A. Did you intend the leftmost force to be F rather than F? If it's F in the downwards direction, it's equivalent to F in the upwards direction. 
May 26th, 2019, 02:22 AM  #3 
Senior Member Joined: Aug 2014 From: India Posts: 470 Thanks: 1  
May 26th, 2019, 04:29 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,969 Thanks: 2219 
The arrow shows the force is acting downward, so the magnitude would be F, not F. Is the answer Fยทd intended to be correct? 
June 14th, 2019, 10:53 PM  #5 
Senior Member Joined: Aug 2014 From: India Posts: 470 Thanks: 1  

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