Under these conditions, energy will arrive at point P with the same phase relationship that existed at the array.
So if I take the torque relative to point P, then I have...
So it is bMg divided by the moment of inertia about that point P.
Under these conditions, energy will arrive at point P with the same phase relationship that existed at the array.
So if I take the torque relative to point P, then I have...
So it is bMg divided by the moment of inertia about that point P.