09_InstSolManual_PDF_Part4

# 09_InstSolManual_PDF_Part4 - 9-4 Chapter 9 Then with v 5 0...

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Then, with and the equation gives Reflect: The angular acceleration is negative because the wheel is slowing down. 9.18. Set Up: Let the direction of rotation of the flywheel be positive. Solve: (a) gives At the start of the interval the flywheel was rotating at in the opposite direction. (b) gives 9.19. Set Up: Let the direction of rotation of the flywheel be positive. Solve: gives Reflect: At the end of the 4.00 s interval, which checks. 9.20. Set Up: Eq. 9.7 is Eq. 9.11 is Solve: so and 9.21. Set Up: Solve: Reflect: requires that be in 9.22. Set Up: where must be in Solve: (a) (b) v 5 v r 5 0.600 m / s 0.0400 m 5 15 rad / s 5 143 rpm v 5 1 0.0750 m 21 64.9 rad / s 2 5 4.87 m / s 620 rpm 5 64.9 rad / s. 1 rpm 5 2 p 60 rad / s. rad / s. v v 5 r v , rad / s. v v 5 r v v 5 r v 5 1 6.5 3 10 2 3 m 21 130.9 rad / s 2 5 0.85 m / s v 5 1250 rpm 5 130.9 rad / s r 5 6.5 mm 5 6.5 3 10 2 3 m. v 2 2 v 0 2 5 2 a 1 u 2 u 0 2 . u 5 u 0 1 1 2 a 1 v 2 v 0 21 v 1 v 0 2 5 u 0 1 1 2 a 1 v 2 2 v 0 2 2 . u 5 u 0 1 v 0 1 v 2 v 0 a 2 1 1 2 a 1 v 2 v 0 a 2 2 5 u 0 1 1 2 a 1 v 2 v 0 21 2 v 0 1 v 2 v 0 2 t 5 v 2 v 0 a u 5 u
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