1. Figure 5-42 a shows a crude mobile hanging from a ceiling, with two metal pie

Question

1. Figure 5-42a shows a crude mobile hanging from a ceiling, with two metal pieces strung by cords of negligible mass. The masses of the pieces are given.

What is the tension in

(a) the bottom cord

____________ N

(b) the top cord?

____________ N

2. Figure 5-42b shows a similar mobile consisting of three metal pieces. The masses of the highest and lowest pieces are given. The tension in the top cord is 196N. What is the tension in

(c) the lowest cord and

____________ N

(d) the middle cord?

____________ N

1. Figure 5-42a shows a crude mobile hanging from a ceiling, with two metal pieces strung by cords of negligible mass. The masses of the pieces are given. What is the tension in (a) the bottom cord ____________ N (b) the top cord? ____________ N 2. Figure 5-42b shows a similar mobile consisting of three metal pieces. The masses of the highest and lowest pieces are given. The tension in the top cord is 196N. What is the tension in (c) the lowest cord and ____________ N (d) the middle cord? ____________ N

Explanation / Answer

1. a) tension =44.14 N b)tension on top cord =68.6 N 2.(10.3+m)g=196 therefore m=9.7 k.g c) tension =5.5 *g =53.9 N d)tension in the middle cord =15.2 *g =148.9 N

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