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

2024
Views:

163

Pages:

1
Author:

Knonycalonm1

COSMOS: Complete Online Solutions Manual Organization System Chapter 3, Solution 142. (a) Have M B = rC/B FN = ( 0.1 m )( 800 N ) = 80.0 N ⋅ m or M B = 80.0 N ⋅ m (b) By definition M B = rA/B P sin θ where θ = 90° − ( 90° − 70° ) − α = 90° − 20° − 10° = 60° ∴ 80.0 N ⋅ m = ( 0.45 m ) P sin 60° P = 205.28 N or P = 205 N (c) For P to be minimum, it must be perpendicular to the line joining points A and B. Thus, P must be directed as shown. Thus or M B = dPmin = rA/B Pmin 80.0 N ⋅ m = ( 0.45 m ) Pmin ∴ Pmin = 177.778 N or Pmin = 177.8 N . 20°

COSMOS Chapter 3 Solution 142

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