What are the reactions at the support? (momentum)

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SUMMARY

The discussion centers on understanding the signs in the torque formula as presented in an online course. A participant seeks clarification on the direction of torque related to a 200 lb moment at a distance of 2 ft. The conclusion drawn is that the negative sign indicates the torque acts in the opposite direction. This highlights the importance of correctly interpreting signs in torque calculations for accurate problem-solving.

PREREQUISITES
  • Understanding of basic physics concepts, specifically torque and moments.
  • Familiarity with the formula for torque: τ = r × F.
  • Knowledge of vector direction and its significance in physics.
  • Experience with online learning platforms for accessing course materials.
NEXT STEPS
  • Review the principles of torque and its applications in physics.
  • Study the significance of signs in physics equations, particularly in mechanics.
  • Explore online resources or textbooks that cover torque and moment calculations.
  • Practice solving problems involving torque with varying signs and directions.
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Students in physics courses, educators teaching mechanics, and anyone looking to deepen their understanding of torque and its calculations.

Curious314
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I am taking this course online, and in one of the slides there is this example, but i can't figure out the signs in the momentum formula.
THANKS!

so here is the exersice:
 

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It's not immediately clear to me just from the diagram what the direction of the couple (torque) is supposed to be at the end of the object, but given that they put a negative sign on the 2ft, 200lb moment (not momentum), I infer that the torque is in the opposite direction than that.
 

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