In Fig. 9-39, three uniform thin rods, each of length L = 49 cm, form an inverted U. The vertical rods each have a mass of 14 g; the horizontal rod has a mass of 33 g. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass? (Give your answer in cm)(adsbygoogle = window.adsbygoogle || []).push({});

http://edugen.wiley.com/edugen/courses/crs1650/art/qb/qu/c09/fig09_37.gif

Fig. 9-39

Problem 4.

a) 24.5cm

b) ? cm

(m1*x1+m2*x2+m3*x3)/(m1+m2+m3)

(33g*49cm+14g*0cm+14g*0cm)/(33g+14g+14g)

(33*49)/(33+14+14)=1617gcm/61g=26.5082cm <--incorrect

any help towards the correct answer will be extremely appreciated. thanks!

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# Homework Help: Center of Mass. Confused on part b.

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