04_InstSolManual_PDF_Part14 - F 5 410 w F w 5 0.049 N 1...

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(b) (i) The free-body diagram for the bullet while it is in the barrel is given in Figure 4.48a. (ii) The free-body diagram for the bullet after it leaves the barrel is given in Figure 4.48b; the forces F and n from the rifle no longer act on the bullet. Figure 4.48 (c) (d) gives 4.49. Set Up: Take to be upward. Solve: (a) The free-body diagram for the froghopper while it is still pushing against the ground is given in Figure 4.49. Figure 4.49 (b) gives gives so (c) Reflect: The ground pushes upward on the froghopper with a large force because the froghopper pushes downward on the ground with a large force.
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Unformatted text preview: F 5 410 w F w 5 0.049 N 1 12.3 3 10 2 6 kg 21 9.8 m / s 2 2 5 410; 0.049 N n 5 w 1 ma 5 m 1 g 1 a 2 5 1 12.3 3 10 2 6 kg 21 9.8 m / s 2 1 4.0 3 10 3 m / s 2 2 5 n 2 w 5 ma , g F y 5 ma y a y 5 v y 2 v y t 5 4.0 m / s 2 1.0 3 10 2 3 s 5 4.0 3 10 3 m / s 2 . v y 5 v y 1 a y t t 5 1.0 3 10 2 3 s. v y 5 4.0 m / s, v y 5 0, x y n w a 1 y t 5 v x 2 v x a x 5 965 m / s 2 1.03 3 10 6 m / s 2 5 0.937 ms v x 5 v x 1 a x t a 5 1 1.03 3 10 6 m / s 2 2 1 1 g 9.80 m / s 2 2 5 1.05 3 10 5 g F ( a ) ( b ) x x y n w y w 4-14 Chapter 4...
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