University:
Michigan State University
Course:
ERG 160 | Success in Science, Technology, Engineering, and Mathematics
Academic year:

2020
Views:

458

Pages:

1
Author:

pravitate8aj14

COSMOS: Complete Online Solutions Manual Organization System Chapter 9, Solution 190. First note that A = A1 − A2 − A3 = (100 mm )(120 mm ) − ( 80 mm )( 40 mm ) − ( 80 mm )( 20 mm ) = (12 000 − 3200 − 1600)mm 2 = 7200 mm 2 ( )1 − ( I y )2 − ( I y )3 Iy = Iy Now where ( I y )1 = 121 (120 mm )(100 mm )3 = 10 × 106 mm 4 ( I y )2 = 121 ( 40 mm )(80 mm )3 = 1.7067 × 106 mm 4 ( I y )3 = 121 ( 20 mm )(80 mm )3 = 0.8533 × 106 mm 4 Then I y = (10 − 1.7067 − 0.8533) × 106 mm 4 = 7.44 × 10 mm or I y = 7.44 × 106 mm 4 And k y2 = Iy A = 7.44 × 106 mm 4 = 1033.33 mm 2 7200 mm 2 k = 32.14550 mm or k y = 32.1 mm

COSMOS Chapter 9 Solution 190

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