When you drop a vibrating 440 Hz tuning fork down an elevator shaft, it will continue to vibrate at the same frequency until it reaches the bottom. The sound waves produced by the tuning fork will travel down the shaft and reflect off the walls, creating an echo effect.
No, the frequency of the tuning fork will remain constant as it falls down the elevator shaft. This is because the frequency of a tuning fork is determined by the length and stiffness of its tines, which will not change during its fall.
The sound of the tuning fork will become quieter and more muffled as it falls down the elevator shaft, due to the sound waves being absorbed by the walls of the shaft. This effect is similar to shouting into a tunnel.
The pitch of the tuning fork will remain the same at the bottom of the elevator shaft as it was at the top. However, due to the changing acoustics of the shaft, the sound may appear slightly different to our ears.
The tuning fork continues to vibrate due to its inertia. Once the tuning fork is set in motion, it will continue to vibrate until an external force, such as air resistance or the impact at the bottom of the shaft, stops it.