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14 Nov 2019
A bar of negligible resistance and mass of 65 kg 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 of 920 g. The uniform magnetic field has a magnitude of 410 mT, and the distance between the rails is 48 cm. The rails are connected at one end by a load resistor of 64 m ohm. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the terminal velocity (i.e., the eventual steady-state speed v infinitive) reached by the bar? Answer in units of m/s.
A bar of negligible resistance and mass of 65 kg 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 of 920 g. The uniform magnetic field has a magnitude of 410 mT, and the distance between the rails is 48 cm. The rails are connected at one end by a load resistor of 64 m ohm. The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the terminal velocity (i.e., the eventual steady-state speed v infinitive) reached by the bar? Answer in units of m/s.