10_InstSolManual_PDF_Part20

10_InstSolManual_PDF_Part20 - each rod. Solve: (a) The...

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Solve: so Reflect: The external torque must be very small for this degree of stability. 10.58. Set Up: The earth rotates once in so If the earth is approximated by a uniform sphere, then with and Solve: so 10.59. Set Up: The cylinder and sphere are drawn in Figure 10.59. The mass of each object can be considered as located at its center of mass, at its geometrical center. Use coordinates that have the origin at the center of the cylinder and the x axis horizontal. Figure 10.59 Solve: (a) Before pregnancy, The center of mass of the pregnant woman is at The center of mass moves a horizontal distance of 2.9 cm. (b) The person must shift her upper body backward to keep her center of mass from extending past her feet. (c) The unnatural posture and curved back strains the back muscles. 10.60. Set Up: Apply with upward and apply with the pivot at the point of suspension for
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Unformatted text preview: each rod. Solve: (a) The free-body diagram for each rod is given in Figure 11.60. g t 5 1 y g F y 5 x cm, f 5 1 1 20 cm 21 10 kg 2 60 kg 1 10 kg 5 2.9 cm. x cm, i 5 0. x y 15cm 5cm 12.5cm t 5 5.42 3 10 22 N # m t 5 1 7.657 3 10 2 12 rad / s 2 2 5 1 5.97 3 10 24 kg 21 6.38 3 10 6 m 2 2 1 7.272 3 10 2 5 rad / s 2 t 5 V I v 5 V 2 5 MR 2 v V 5 t I v V 5 2 p rad 1 26,000 yr 21 3.156 3 10 7 s / yr 2 5 7.657 3 10 2 12 rad / s R 5 6.38 3 10 6 m. M 5 5.97 3 10 24 kg I 5 2 5 MR 2 v 5 2 p rad 8.64 3 10 4 s 5 7.272 3 10 2 5 rad / s. 24 hours 5 8.64 3 10 4 s, t 5 1 9.694 3 10 2 13 rad / s 21 2.0 kg 21 2.5 3 10 2 2 m 2 2 1 2.01 3 10 3 rad / s 2 5 2.4 3 10 2 12 N # m t 5 V I v 5 V MR 2 v V 5 t I v V 5 Df D t 5 1.745 3 10 2 8 rad 1.8 3 10 4 s 5 9.694 3 10 2 13 rad / s 10-20 Chapter 10...
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This note was uploaded on 03/06/2009 for the course PHYS 114 taught by Professor Shoberg during the Spring '07 term at Pittsburg State Uiversity.

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