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A thin, 52 cm long metal bar with mass 755 g rests on, but is not...

A thin, 52 cm long metal bar with mass 755 g rests on, but is not attached to, two metallic supports in a uniform 0.41 T magnetic field, as shown in the figure. A battery and a 29 Ω resistor in series are connected to the supports. What is the highest voltage the battery can have without breaking the circuit at the supports? The acceleration due to gravity is g = 9.8 m/s2. (Give your answer in decimal using "V" as unit)

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