Awire that is 0.36 meters long moves perpendicularly through a magnetic field at a speed of 0.21 meters/second. the induced emf produced in the wire is 0.45 volts. what is the magnetic field strength?

The bar of prob. 5/82 is repeated here. the ends of the 0.4-m bar remain in contact with their re- spective support surfaces. end b has a velocity of 0.5 m/s and an acceleration of 0.3 m/s2 in the di- rections shown. determine the angular accelera- tion of the bar and the acceleration of end a.