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HW2soln

# HW2soln - vs Kw mi 3 5.6 The masses of the person and the...

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Unformatted text preview: vs Kw . . mi: 3+ 5.6 The masses of the person and the during beam are 54 kg F and 36 kg. respectively. Assume that they:r are in equilibrium. (:1) Draw the free-body diagram of the diving heard. {In} Determine the reactions at th support: A and B. ﬂew- i : MD A ” C e f w :WW w 5.11[ The hydraulic piston AB exerts a 400-“:- furce on the ladder at B in the direction parallel to the piston when the truck is not moving. (a) Detenninc the weight of the ladder and the reactions at the frictionless pin C. {b} For that weight, determine the piston AB force and the reactions at C when the truck accelerates to the left at 5 ﬂfsecz. Neglect all drag. (a) ﬁreﬂc emcee egMciozé’W‘élﬂémQ)(s) +125} =C/ meats —ze¢,s = c: §OIU‘€: (“Steep WWJJ-s-tf 5'?" ml.(cu{q:&1r) .__.—-—"- C ﬁll-Ll lief 5.2? The eirplene‘e weight is W= 2400 lb. Its brakes keep the rear wheels locked. The front {nose} wheel can turn freely, and so the ground exerts no horizontal force on it. The force T ex erted by the air-plane‘s propeller is horizontal. (a) Draw the free-hotly diagram of the airplane. Determine the reaction exerted on the nose wheel and the total normal reaction exerted on the rear wheels {h} when T: (I; to) when T= 25G lh. (d) when T= 25B 113. and the brakes are released. Neglect all drag and resistance to rolling on the wheels. The wheel masses are negligible. r4 sued) ”P (a: 1. ‘1— 18.5 The cranc movca to the right with constant acceleration, and thc EDﬂ-kg load movca without swinging, [a] What is lhc accclcralion ofthc crane and load? {b} What are the tonsiona in the cables attached at A and B? 18.6 The total weight of the gen-cert and driver ie 240 1b. The toeatien of their combined center or mass is shown- The rear drive wheels tegelher exert a Eat-lb herizentai three on the track. Neglect the herimntal fereee exerted on the [rent wheels. {3} What is the magnitude of the ge-eart’s aeeeieratiun? {b} What nermal forces am exerted on the tires at A and B? gelu-Q I Ay+6f:2_qfh ““0 A7 +q'q'E7/y : ”3G0 .________________‘______———- ...
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