FinalExamSolutions - The mechanism consists of the four...

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Unformatted text preview: The mechanism consists of the four pin-connected bars and three springs, each having a stiffnex k and an unstretched length 10- Determine the horizontal forces P that must be applied to the pins in order to hold the mechanism in the horizontal position for equilibrium. The disk has a weight Wand lies on a plane which has a coefficient of static friction [1,. Determine the maximum height h to which the plane can be lifted without causing the disk to slip. «‘Wé # zkll’bé +2“ +20%) (V Llal 4— $147" )7. W W) @ H 464749142 \E\ z @ W = W {5:sz 402+S‘n (mp—1" ‘3‘» :f" \E\ _ m W 1 fig/- =:—’-—’ (D V ’ 40513 m 2A ~ WHOM :Lflrflfimm g A o D C p s o 2 1°” 9“ Arm ARGO : TzL 36:“ =J2_2a m c S : 2% Ga @ Thewlbboystandsonthebeamandpmlswitha force of 40 lb. If (m), = 0.4 , determine the frictional force between his shoes and the beam and the reactions at A and - B. The beam is uniform and has a weight of 100 lb. Neglect the size of the pulleys and the thicknefi of the beam. a. , o \ ”>55 : 90x: - 3M , 40"}:‘4‘0 + By *0 GD “)2‘5) : —40+40XT§ ~95.Y’/OO +1437£Bj ”9009764270 (3)2145 : ‘(OxlB ’- 90»ng 1L q§,l/x8+ 40xcwéovx7 +l00xé5- ~. 4A5 2‘0 O) Bx: 34,6) Lbs (3) A5 = 4433 Lbs C79 (2) B3 : ~ 224,1, LB ...
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