The discussion revolves around a physics problem related to forces, specifically referencing a video by Walter Lewin. Participants are comparing their interpretations of the direction of a force, which is indicated as -27μN in the answer key, while one participant has calculated it as +27μN.
There is ongoing dialogue with some participants suggesting practical adjustments, such as flipping the paper to align the coordinate system. Others are questioning the clarity of the video and the answer key, indicating a lack of consensus on the correct interpretation of the force direction.
Participants are working within the constraints of a homework assignment, referencing a specific video and an answer key that may not align with their calculations. The discussion reflects uncertainty about the assumptions made regarding the coordinate system and the direction of the force.
@Antiphon: Nice answer!Antiphon said:Flip the paper over. Then your i-hat will point the same way his does.
Antiphon said:Flip the paper over. Then your i-hat will point the same way his does.
SammyS said:Seriously, Mr. Lewin clearly states that the force is toward the left.
Therefore, it's in the -\hat{i} direction.
How do you get the force going to the right?flyingpig said:The answer key said the force is -27\mu N \hat{i}
From Walter Lewin's method, I got +27\mu N \hat{i}. Help?