Og Files C Google Se X Field Of Beams. You Have X a 1.00-m metal bar that ha X s

Question

Og Files C Google Se X Field Of Beams. You Have X a 1.00-m metal bar that ha X speed of ligh https://webcour ses.ucf.edu/courses/1078142/files/folder /WEEK-08?preview 43143480 Apps 2 Guild Wars 2 Wiki mSN Commercial Pier sur... D YouTube Watch Nanatsu no T... h one piece o... N Netflix MyRWC Start Y MetaBattle Wiki M C Field Of B You... Problem set 3 Spr 15 (JBB).docx Download 0 Info 3 Close box Problem #5 Figure P27.37 metal contacts A 1.00-m metal bar that has a mass of 0.900 kg is initially pinned in place on an incline 65.0° above the horizontal bar (Figure P27.37). There is a 0.850-T magnetic field directed m 0.2 upward in the region around the bar, and metal contacts along the incline allow a current through the bar. If the co efficient of static friction between bar and contacts is 0.200, (a) what are the minimum magnitude and the direction of the current that must pass through the bar to keep it from moving once it is released? (b) Is there a maximum current that can be used in that same direction that will also hold the bar in place? 65.0° 8:34 PM 3/1/2015

Explanation / Answer

apply gravitational force of wire = magnetic forcer

0.2 mg =   ILB sin theta

so current I = mg/( LB sin theta)

i = 0.2*0.9*9.8/( 1 * 0.85 * sin 65)

i = 2.29 Amps -------------------<<<<<<<<<<<<<Answer

----------------------

for max current , sin theta = sin 90 = 1

so

I = 0.9*9.8/( 1 * 0.85 * sin 90)

I = 10.45 Amps

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