Youve decided to make the magnetic projectile launcher
Chapter 30, Problem 30.102(choose chapter or problem)
Youve decided to make the magnetic projectile launcher shown in FIGURE P30.58 for your science project. An aluminum bar of length l slides along metal rails through a magnetic field B. The switch closes at t = 0 s, while the bar is at rest, and a battery of emf Ebat starts a current flowing around the loop. The battery has internal resistance r. The resistances of the rails and the bar are effectively zero. a. Show that the bar reaches a terminal speed vterm, and find an expression for vterm. b. Evaluate vterm for Ebat = 1.0 V, r = 0.10 , l = 6.0 cm, and B = 0.50 T.
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