Re: [Phys-l] amazing golf shot

[brian whatcott <betwys1@sbcglobal.net>]

On 3/7/2011 8:08 PM, Anthony Lapinski wrote:
> A student sent me this clip of an incredible chip shot by Tiger Woods.
>
> http://www.youtube.com/watch?v=I1I55z-x6zc
>
> The huge crowd cheered as the ball approached the hole, and the student
> asked me if sound affected the ball near the cup. I had never seen this
> clip before and had to watch it several times. It appears that the ball
> always has momentum.
>
> I am now wondering -- as my student did: If the ball really did stop
> momentarily, could longitudinal sound vibrations from the nearby roaring
> crowd shake the ground enough to slightly move the ball into the hole?
To gain a fighting chance at analyzing the circumstance, let's suppose 
that c is 1000 fps
 and the ball diameter is 2 inches (both numbers picked out of the air, 
certainly).

Let us further suppose that in order to gain perceptible energy from the 
incident
 sound waves, the ball needs to represent at least a wavelength.
Then we ask - is the energy in the crowd's roar centered on 6kHz?

Probably not.

Brian W