06_InstSolManual_PDF_Part7

06_InstSolManual_PDF_Part7 - 6.16 Set Up The spheres exert...

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Solve: (a) and (b) The free-body diagram is shown in Figure 6.13. F is the force exerted by the blood vessel. Figure 6.13 (c) gives and upward (d) When the arm hangs vertically and at rest, so Reflect: The acceleration of the hand is only about 20% of g , so the increase in the force on the blood drop when the arm swings is about 20%. 6.14. Set Up: The forces on the water are the downward force of gravity and the downward normal force exerted by the bottom of the pail on the water. The acceleration of the water is downward. At the minimum speed, the water starts to fall from the bucket and Solve: The free-body diagram for the water is given in Figure 6.14. with gives Figure 6.14 6.15. Set Up: The discussion at the end of Section 6.2 relates walking speed to the length R of the leg and g , the acceleration due to gravity on the moon. Solve: (a) (b) On earth so Reflect: He can walk faster on earth because the gravity force is greater there.
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Unformatted text preview: 6.16. Set Up: The spheres exert a gravitational force on each other. Each sphere has mass m . Solve: m 5 r Å F g G 5 1 0.25 m 2 Å 3.0 3 10 2 9 N 6.673 3 10 2 11 N # m 2 / kg 2 5 1.7 kg F g 5 G m 2 r 2 . G 5 6.673 3 10 2 11 N # m 2 / kg 2 v max 5 "1 9.80 m / s 2 21 0.95 m 2 5 3.1 m / s g 5 9.80 m / s 2 v max 5 " gR 5 "1 1.67 m / s 2 21 0.95 m 2 5 1.3 m / s x y mg n a rad v 5 " gR 5 "1 9.80 m / s 2 21 0.600 m 2 5 2.42 m / s mg 5 m v 2 R . n 5 0, g F y 5 ma y , n S 0. a rad 5 v 2 / R , F 5 w 5 mg 5 9.8 3 10 2 3 N. a rad 5 1.15 3 10 2 2 N, F 5 m 1 g 1 a rad 2 5 1 1.00 3 10 2 3 kg 21 9.80 m / s 2 1 1.73 m / s 2 2 5 F 2 w 5 ma rad g F y 5 ma y y x w 5 mg F a rad a rad 5 v 2 R 5 1 1.10 m / s 2 2 0.700 m 5 1.73 m / s 2 v 5 1 8 1 2 p R 0.50 s 2 5 1.10 m / s Circular Motion and Gravitation 6-7...
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