Re: [Phys-l] An intersting integral calc. problem.

[John Mallinckrodt <ajm@csupomona.edu>]

I'm skeptical.  If it DOES flatten that much, the time of impact is  
considerably longer than it might otherwise be, thus reducing the  
average force.  For a complete flattening, I get an average force of  
something like mv^2/(2d).  With m = 50 g, v = 150 mph, and d = 4 cm,  
this gives something like 3 kN, it seems to me that I can pretty  
easily apply a static force of 1 kN (e.g., by standing on the ball)  
and I'd expect to see very little compression.  So, as I say, color  
me skeptical.

On Jul 7, 2010, at 3:08 PM, Bernard Cleyet wrote:

> http://www.flixxy.com/golf-ball-slow-motion.htm
>
> > Golf Ball Hitting Steel At 150mph - Slow Motion (70,000 fps)