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 g and electrical resistance 0.500 2 rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance L = 9.00 cm apart. (Figure 1)The rails are also connected to a Figure 1 of 1 <.
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 g and electrical resistance 0.500 2 rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance L = 9.00 cm apart. (Figure 1)The rails are also connected to a Figure 1 of 1 <.
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Find Us, the coefficient of static friction between the rod and the rails

Transcribed Image Text: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 g and electrical resistance 0.50 2 rests
on parallel horizontal rails that have negligible electric
resistance. The rails are a distance L = 9.00 cm
apart. (Figure 1)The rails are also connected to a
Figure
1 of 1

Transcribed Image Text:Rail Gun
resistance. The rails are a distance L = 9.00 cm
apart. (Figure 1)The rails are also connected to a
voltage source providing a voltage of V = 5.00 V.
The rod is placed in a vertical magnetic field. The rod
begins to slide when the field reaches the value B =
0.218 T. Assume that the rod has a slightly flattened
bottom so that it slides instead of rolling. Use 9.80
m/s for the magnitude of the acceleration due to
gravity.
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Figure
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