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May 26th, 2019, 01:30 AM   #1
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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.
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May 26th, 2019, 01:45 AM   #2
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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.
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May 26th, 2019, 02:22 AM   #3
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Quote:
Originally Posted by skipjack View Post
Did you intend the leftmost force to be -F rather than F?
Leftmost force F is acting downward so -F.
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May 26th, 2019, 04:29 AM   #4
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The arrow shows the force is acting downward, so the magnitude would be F, not -F.

Is the answer Fยทd intended to be correct?
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June 14th, 2019, 10:53 PM   #5
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Quote:
Originally Posted by skipjack View Post
The arrow shows the force is acting downward, so the magnitude would be F, not -F.
Are you saying my diagram is wrong?
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