1/ In the figure, three uniform thin rods, each of length L = 17 cm, form an inv

Question

1/ In the figure, three uniform thin rods, each of length L = 17 cm, form an inverted U. The vertical rods each have a mass of 11 g; the horizontal rod has a mass of 50 g. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass? (Give your answer in cm)

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2/

A big olive

(m = 0.15 kg) lies at the origin of an xy coordinate system, and a big Brazil nut (M = 0.62 kg) lies at the point (0.72, 1.7) m. At t = 0,a force

begins to act on the olive, and a force

begins to act on the nut. What is the (a)x and (b)y displacement of the center of mass of the olive-nut system at t = 6.6 s, with respect to its position at t = 0?

Explanation / Answer

xcom=((0)(14g)+(15cm)(14g)+(15/2cm)(60g))/(60+14+14)= 7.5 cm
ycom=((-7.5cm)(14g)+(0)(60g)+(-7.5cm)(14g))/(60+14+14)= -2.386cm

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