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if the force vector F elect A-->B is in the positive direction form the unit vector r A-->B , the unit vector must be multiplie...Asked by Su
if the force vector F elect A-->B is in the positive direction form the unit vector r A-->B , the unit vector must be multiplied by a negative number . where does this negative number come from in the Coulomb equation? Does this negative number indicate a repulsive force or an attractive force?
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