Magnetism: Rail Gun A rail gun uses electromagnetic forces to accelerate a 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 40.0 gg and electrical resistance 0.400 ΩΩ rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance LLL = 10.0 cmcm apart. (Figure 1)The rails are also connected to a voltage source providing a voltage of VVV = 5.00 VV . The rod is placed in a vertical magnetic field. The rod begins to slide when the field reaches the value BBB = 0.157 TT . Assume that the rod has a slightly flattened bottom so that it slides instead of rolling. Use 9.80 m/s2m/s2 for the magnitude of the acceleration due to gravity. Find μs, the coefficient of static friction between the rod and the rails. (give answer numerically)
Magnetism: Rail Gun
A rail gun uses
The rod is placed in a vertical magnetic field. The rod begins to slide when the field reaches the value BBB = 0.157 TT . Assume that the rod has a slightly flattened bottom so that it slides instead of rolling. Use 9.80 m/s2m/s2 for the magnitude of the acceleration due to gravity.
Find μs, the coefficient of static friction between the rod and the rails. (give answer numerically)
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