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Unformatted text preview: Topics Equilibrium Examples Multiple FBDs Use of Inclined Axes Tipping Book Sections 3/13/4 T W 1 2 mass = 225 kg Find the tension, T, required to hold the weight in equilibrium. The strings on pulleys1 and 2 (which are joined) are attached to the pulleys at the dots A B (multiple FBDs) 656 1 2 100 300 r mm r mm = = T A T TA 1 2 T B F B T B T T (1) (2) (3) + + + TA 1 2 100 300 r mm r mm = = ( 29 ( 29 225 9.81 2207.25 W N = = 2 2 y A A F T T T T = = = ( 29 ( 29 ( 29 ( 29 100 300 2 3 3 O A B A B M T T T T T = = = = 2 2 2207.25 3 827.7 y F T T T N = + = = (use of inclined axes) mass = 3500 kg 30o 38o G 2 m 2 m 1 m 3 m 1.5 m Determine the force in the cable and the forces exerted on the wheels at A and B by the inclined surface A B 658 A B T 30o 38o x y W W =(3500)(9.807) = 34,325 N + 2 2 1.5 3 1 + 60 60 + cos38 sin 30 21,780 21.8 x o o F T W T N kN = = = = ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 ( 29 4 sin30 1.5 cos30 2 cos38 3tan38 sin38 5 35,245 35.2 A...
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This note was uploaded on 10/17/2011 for the course EM 274 taught by Professor Boylan during the Fall '08 term at Iowa State.
 Fall '08
 Boylan

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