For a mass on an incline plane, is the downward force mg cos Θ or -mg cos Θ?
I'm inclined to state there should be a negative but from my lectures, the negative does not appear to be stipulated. I was wondering if it's was a mistake by the lecturer.
mg cos Θ + FN = 0
mg cos Θ = -FN
the downward force must be of equal magnitude to the normal force-but opposite direction.
This makes sense mathematically.
However, geometrically, it does make sense for the down ward force to be -mg cos Θ.
Could someone clarify?
I'm inclined to state there should be a negative but from my lectures, the negative does not appear to be stipulated. I was wondering if it's was a mistake by the lecturer.
mg cos Θ + FN = 0
mg cos Θ = -FN
the downward force must be of equal magnitude to the normal force-but opposite direction.
This makes sense mathematically.
However, geometrically, it does make sense for the down ward force to be -mg cos Θ.
Could someone clarify?
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