Calculate the torque using the moment arm.  (Only using a vertical line and ruler.) Hint: Show your work, as usual, start with the equation in symbols, then put in the numbers with units all the way through. If you don't know how to use the equation formatting please handwrite your calculation and upload the image (upright and cropped appropriately).

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A: answer  option(c) -16

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A: Ans:- Image-1

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Helmholtz Free Energy

The Helmholtz free energy is a thermodynamic potential used to calculate the measure of useful work from a closed system. This system is kept at constant temperature and volume. German physicist Hermann Helmholtz introduced this concept in 1882.