a long thin rod is cut into two pieces, one being twice as long as the other. to the midpoint of piece a (the longer piece), piece b is attached perpendicularly, in order to form the inverted "t" shown in the drawing. the application of a net external torque causes this object to rotate about axis 1 with an angular acceleration of 4.6 rad/s2. when the same net external torque is used to cause the object to rotate about axis 2, what is the angular acceleration?