Rail Gun Pa A rail gun uses electromagnetic forces to accelerate a . Ra projecti
ID: 1792819 • Letter: R
Question
Rail Gun Pa A rail gun uses electromagnetic forces to accelerate a . Ra projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 20.0 g and electrical resistance 0.200 rests on parallel horizontal rails that have negligible electric resistance. The rails are 3 Pr a distance L = 8.00 cm apart (Figure 1) The rails are Pr The rod is placed in a vertical magnetic field. The rod D4.90x102 T Assume that the rod has a slightly also connected to a voltage source providing a voltage of V=5.00 V begins to slide when the field reaches the value B = Dir 2 flattened bottom so that it slides instead of rolling. Use 9.80 m/s2 for the magnitude of the acceleration due to Ma gravityExplanation / Answer
I = V / R = 5 / 0.2 = 25 A
and F = I L B = 25 x 0.08 x 4.90 x 10^-2 = 0.098 N
us = F / m g
us = (0.098) / (20 x 10^-3 x 9.8)
us = 0.5
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