Pre-Calc Homework Solutions 314

8yk 9 n k 1 yk2 y 9 yk2 y 4169 y 232 3 0 7 when

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Unformatted text preview: eighs F(x) Then 18 (b) 0 124.8y y 2 dy 144 18 18 x/2 144 1 x 36 144 18 4x lb. 1123.2 lb 14. (a) From the equation x2 32 y2 82 1, it follows that a thin y2 y, where y is 64 W 0 (144 4x) dx k(14 2 144x 2x 2 1944 ft-lb 0 horizontal rectangle has area 6 1 8. (a) F (b) F(x) (c) F 9. (a) F (b) F(x) ks, so 800 200x, and 10) and k 100x 2 200 lb/in. 2 distance from the top, and pressure 62.4y. The total force is approximately n 200x dx 0 400 in.-lb. 0 200s, so s ks, so 21,714 7238x. W 1600 200 8 in. 5) and k 7238 lb/in. 3619x 2 1 (62.4yk) 6 k 1 8 1 yk2 64 y 374.4yk k 1 7987.2 1 n 1 8 0 yk2 64 y. k(8 1/2 (b) 0 374.4y 1 y2 dy 64 y 2 3/2 64 1/2 0 7987.2 lb 7238x dx 0 904.75 3619x 2 1 905 in.-lb, and W 2714.25 1/2 7238x dx 1/2 2714 in.-lb....
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