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Find the magnitude of FB?
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05-29-2014, 11:03 AM
Post: #2
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(a)
The thing to notice here is that if the resultant force is perpendicular to the wall then the vertical components of FA and FB must cancel. The vertical component of FA is up(+) and the vertical component of FB is down(-). FA.y + FB.y = 0 FA.y = |FA|*sin(50) FB.y = -|FB|*sin(70) FA.y + FB.y = |FA|*sin(50) - |FB|*sin(70) = 0 |FB|*sin(70) = |FA|*sin(50) |FB| = |FA|*sin(50)/sin(70) |FB| = 81.52 N ............................. Answer (a) (b) FB = |FB|*cos(70) - j*|FB|*sin(70) FB = 27.9 - j*76.6 N ...................... Answer (b) Ads |
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Find the magnitude of FB? - 769 - 05-29-2014, 10:47 AM
[] - Nathan Kiranov - 05-29-2014 11:03 AM
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