The natural frequency of vibration, in bending, of the wing of a military aircraft is found to be 20 Hz. Find the new frequency of bending vibration of the wing when a weapon, weighing 2000 lb, is attached at the tip of the wing, as shown in Figure. The stiffness of the wing tip, in bending, is known to be 50,000 lb/ft.
The natural frequency of the wing itself is
The natural frequency of the weapon
The frequency of vibration of the wing with weapon