a mobile hanging from a ceiling; it consists of two metal pieces (m1 3.5 kg and m2 4.5 kg) that are strung together by cords of negligible mass.What is the tension in (a) the bottom cord and (b) the top cord? a mobile consisting of three metal pieces.Two of the masses are m3  4.8 kg and m5  5.5 kg.The tension in the top cord is 199 N.What is the tension in (c) the lowest cord and (d) the middle cord?

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