ch29-p090 - 90(a Consider a segment of the projectile...

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v W mm iw R L f = F H G I K J =+ F H G I K J L N M O Q P = ×⋅ × + × L N M M O Q P P 22 2 1 2 4 10 450 10 1 12 4 0 21 01 0 23 10 12 0 2 73 2 3 3 ext Tm /A A cm /6 .7cm m kg m/s. / / / ln ln . . . µ π π π c hc h bg b g ch 90. (a) Consider a segment of the projectile between y and y + dy . We use Eq. 29-12 to find the magnetic force on the segment, and Eq. 29-7 for the magnetic field of each semi- infinite wire (the top rail referred to as wire 1 and the bottom as wire 2). The current in rail 1 is in the + ± i direction, and the current in rail 2 is in the ± i direction. The field (in the region between the wires) set up by wire 1 is into the paper (the ± k direction) and that set up by wire 2 is also into the paper. The force element (a function of y ) acting on the segment of the projectile (in which the current flows in the
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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