Quiz+4+022210+(solution) - NameMm E82120 — Dynamics —...

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Unformatted text preview: NameMm E82120 — Dynamics — Spring 2010 Quiz #4 - Monday, February 22, 2010 1. For a short time, the crane lifts the 2.50 Mg beam with a force of F = (28 + 332) kN. Determine the speed of the beam when it has risen s = 3m. @ T+ZUW=T 7. T‘io 3 @ Q’k\-L)F= [(28+382> AS '-'- HI . KN'M (2.) 01.4)“) = -\/\J a z — 2.\‘o(\03)(0i.<6\)(3) -. 4135-6 Mm ® T? : Vim V2 : l/vlis'DOYV—L3 : \250 \r?’ (a) O *THpOO-S’rflS’SLS': layov-Z 37,415 : VLSO \j“; 2.50 (103)(9.81) N (b) Q) \Y—= 3323.25 : 5.4-7 m/5 Q 3:3M I‘L'S’D Extra Credit: Set up the expression to determine the time it takes to attain this height starting from rest. Q = % vJ/ (Z$$>+Sa)¥103 ~Z$oo(9.81)5:‘/1<1500)\r2' :. \r = (2.493+o.s:3\%“ As AB R?" 4c 3 (7 : n 6) f3 0 (Z-W$+O.3sb) 7.. “‘7 1-1895, Page 1/1...
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