COSMOS Chapter 8 Solution 15 | Answer Key - Edubirdie

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2021
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COSMOS: Complete Online Solutions Manual Organization System Chapter 8, Solution 15. FBD: For impending tip the floor reaction is at C. ( ) W = ( 40 kg ) 9.81 m/s 2 = 392.4 N For impending slip φ = φs = tan −1 µ s = tan −1 ( 0.35 ) φ = 19.2900° tan φ = 0.8 m , EG EG = 0.4 m = 1.14286 m 0.35 EF = EG − 0.5 m = 0.64286 m (a) α s = tan −1 EF 0.64286 m = tan −1 = 58.109° 0.4 m 0.4 m α s = 58.1° (b) P W = sin19.29° sin128.820 P = ( 392.4 N )( 0.424 ) = 166.379 N P = 166.4 N Once slipping begins, φ will reduce to φk = tan −1 µk . Then α max will increase. Vector Mechanics for Engineers: Statics and Dynamics, 8/e, Ferdinand P. Beer, E. Russell Johnston, Jr., Elliot R. Eisenberg, William E. Clausen, David Mazurek, Phillip J. Cornwell © 2007 The McGraw-Hill Companies.

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