A bar of negligible resistance and mass m in the figure below is pulled horizontally across frictionless parallel rails, also of negligible resistance, by a massless string that passes over an ideal pulley and is attached to a suspended mass M. The uniform magnetic field has a magnitude B, and the distance between the rails is ℓ. The rails are connected at one end by a load resistor R. The acceleration of gravity is g.
 

m ww R B M B B B B B B What is the magnitude of the terminal ve- locity (i.e., the eventual steady-state speed V) reached by the bar? M g? R 1. v = Mg R 2. voo = MgR (2 B 3. v0 = Mg R 4. v = Mg R 5. Voo = Mg R 6. voo = Mg R 7. v0 = MgR 2 B? M g? R2 8. voo = 9. v = Mg R 10. voo =