Magnitude of torque in this case

Question

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I want to solve this problem so I need help. The problem wants to determine which is in the direction (+) or (-) and value of torque. I think an answer: In the direction (-) and 5F.r

David Quinn · Accepted Answer · 2017-05-03T14:01:57.623

0

The total (positive) clockwise moment about the centre of the circle is $$3F\cdot r+2F\cdot2r-F\cdot r=6Fr$$

[Relative to the centre of the circle, the $3F$ and $2F$ are acting clockwise and the $F$ is acting anti-clockwise. The diagram indicates that clockwise is positive, so the total is positive.]

edited May 03 '17 at 14:01

answered May 02 '17 at 20:16

David Quinn

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According to your diagram, clock wise is positive, so it's positive – David Quinn May 02 '17 at 20:23
why is it clock wise? – May 03 '17 at 12:53
Relative to the centre of the circle, the $3F$ and $2F$ are acting clockwise and the $F$ is acting anti-clockwise. The diagram indicates that clockwise is positive, so the total is positive. – David Quinn May 03 '17 at 13:56
can you add this into your answer? (Also thank you so much !) – May 03 '17 at 14:00
Great! Thank you again. Have a nice day – May 03 '17 at 14:02

Magnitude of torque in this case

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