378_Physics ProblemsTechnical Physics

378_Physics ProblemsTechnical Physics - 380 Static...

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380 Static Equilibrium and Elasticity ANSWERS TO EVEN PROBLEMS P12.2 FRF yyg +−= 0; FR xx −= 0; P12.40 (a) 0.400 mm; (b) 40.0 kN; (c) 2.00 mm; (d) 2.40 mm; (e) 48.0 kN FF F yg x A A A cos cos sin θθ θ F H G I K J 2 0 P12.42 at A : Mg sin sin β αβ + bg ; at B : Mg sin sin α + P12.4 see the solution P12.44 (a) 160 N to the right; P12.6 0.750 m (b) 13.2 N to the right; (c) 292 N up; P12.8 254 475 .. m, m af (d) 192 N P12.46 146 . k N ; 1 3 3 2 5 8 . ± . ± ij + ej kN P12.10 (a) 9.00 g; (b) 52.5 g; (c) 49.0 g P12.12 (a) 392 N; (b) 339 0 ±± + N P12.48 0.789 P12.14 (a) f mg mgx L =+ L N M O Q P 12 2 cot ; nm m g g ; (b) µ = + + mm d L 2 cot P12.50 T = 168 k N ; R = 234 k N ; 21 2 . P12.52 (a) see the solution; (b) 60.0 ° P12.54 (a) 120 N; (b) 0.300; (c) 103 N at 31.0 ° above the horizontal to the right P12.16 see the solution; 0.643 m P12.56 (a), (b) see the solution; P12.18 36 7 . N to the left; 31 2 . N to the right (c) C AB = 732 N; T AC = 634 N; C BC = 897 N P12.20 (a) 35.5 kN; (b) 11.5 kN to the right; P12.58 (a) 909 109 m ; (b) 10 0 10 9 m ; (c) 4.19 kN down (c) 0114 . m s to the right P12.22 (a) 859 N; (b) 104 kN at 36.9
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