A bullet of mass is fi red with a speed of 250 m/s at a target that is a sheet of metal...

A bullet of mass is fi red with a speed of 250 m/s at a target that is a sheet of metal (mass ). The target is square with sides of length L = 20 cm. The target is hinged along its top edge so that it can swing freely (Fig. P9.75). If the bullet hits in the center of the target and then becomes stuck, what is the angular velocity of the target plus bullet just after the bullet hits?