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Can't get correct sign for a simple force problem
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[QUOTE="Nathanael, post: 5005341, member: 509990"] You don't need to say what is "left" and what is "right." For example, I would of set up the directions as: "the positive direction is the direction of tension and the negative direction is the direction opposite of tension." At any rate, this doesn't affect your answer. I'm not sure why you're doing this... But this step is why it turns out positive instead of negative. All you did in this step was multiply F[SUB]f[/SUB] by -1 (without multiplying the other side by -1) which is why your answer came out altered by a factor of -1 Anyway, doesn't the ||...|| mean "the magnitude of ... "? The magnitude of -1N is 1N. [/QUOTE]
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Can't get correct sign for a simple force problem
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