06_InstSolManual_PDF_Part20

06_InstSolManual_PDF_Part20 - / s mg tan 30.0 5 m v 2 r . T...

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Solve: (a) The free-body diagram for the block is given in Figure 6.57. gives Figure 6.57 (b) gives Reflect: The tension in the upper string must be greater than the tension in the lower string so that together they pro- duce an upward component of force that balances the weight of the block. 6.58. Set Up: The package moves in the arc of a circle so it has acceleration directed toward the center of the curve. Solve: The free-body diagram for the package is given in Figure 6.58. gives gives Therefore, Figure 6.58 and v 5 " gr tan 30.0° 5 "1 9.80 m / s 2 21 50.0 m 2 tan 30.0° 5 16.8 m
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Unformatted text preview: / s mg tan 30.0 5 m v 2 r . T 5 mg cos 30.0 x y T cos30 T sin30 T mg 30 T sin 30.0 5 m v 2 r . g F x 5 ma x T cos 30.0 5 mg . g F y 5 ma y a rad 5 v 2 r , v 5 r 1 T u 1 T l 2 sin u m 5 1 0.75 m 21 80.0 N 1 31.0 N 2 sin 36.9 4.00 kg 5 3.53 m / s 1 T u 1 T l 2 sin u 5 m v 2 r . g F x 5 ma x T l 5 T u 2 mg cos u 5 80.0 N 2 1 4.00 kg 21 9.80 m / s 2 2 cos 36.9 5 31.0 N y x T l sin u T l cos u T u sin u T u T u cos u mg u u T l a rad T u cos u 2 T l cos u 2 mg 5 0. g F y 5 ma y 6-20 Chapter 6...
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