The moment of inertia of the dumbbell relative to the axis through the center of mass is given by: I=∑imir2i=mr2+mr2=2mr2=12mL2 Using New...The moment of inertia of the dumbbell relative to the axis through the center of mass is given by: I=∑imir2i=mr2+mr2=2mr2=12mL2 Using Newton’s Second Law for rotational dynamics, we find the angular acceleration to be: →τext=I→αLFˆz=12mL2→α∴ Because the center of mass is fixed (the sum of the forces is zero), t…