Terminal Speed A bar of length L = 0.8 m is free to slide without friction on horizontal rails, as shown in Fig. 29.48. There is a uniform magnetic field B = 1.5 T directed into the plane of the figure. At one end of the rails there is a battery with emf ? = 12 V and a switch. The bar has mass 0.90 kg and resistance 5.0?, and all other resistance in the circuit can be ignored. The switch is closed at time t = 0.(a) Sketch the speed of the bar as a function of time.(b) Just after the switch is closed, what is the acceleration of the bar?(c) What is the acceleration of the bar when its speed is 2.0 m/s?(d) What is the terminal speed of the bar?

Transcribed Image Text:

X х х X X X X X X X X X X XX X X K L