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Fundamentals of Physics | 10th Edition | ISBN: 9781118230725 | Authors: David Halliday; Robert Resnick; Jearl Walker
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Figure 5-66a shows a mobile hanging from a ceiling; it

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QUESTION:

Figure 5-66a shows 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? Figure 5-66b shows 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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QUESTION:

Figure 5-66a shows 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? Figure 5-66b shows 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?

ANSWER:

Step 1 of 4 a) We need to find out the tension in the bottom cord. The Newton’s second law for the mass is given by, Implies, So it’s clear the tension in the bottom cord is .

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