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We're using newton bar so that when we pull EM apart ( magnet and steel bar ) how much force is needed to separate em both. We'll repeat the same process with another magnet and jot down the force it used to separate itself from iron bar. We'll compare both the forces and the one with larger force would be a stronger magnet.but how? how are the strengths and weight related?
as in the weight will increase if it attracts iron bar ? is that so?