Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: Hardness/restitution




I am puzzled by the following problem

G Barnes (Am Journal of Physics, 1958,vol26, p7) defines coefficint of=
restitution as follows:

e=3D (ae1 +be2)/(a+b)

e1 and e2 are Young coefficient of colliding bodies 1 and 2.=20
a and b are realtive hardness of substances 1 and 2.=20

How establish and explain the dependance of the coefficient of restitution=
upon the hardness of bodies?
What is the link between hardness and rebound?=20

All comments are highly welcomed.=20

D. Ismael Youssouf.

This is a puzzlement! A rubber ball might have a good coefficient of
resitution (rebound) and fail miserably on a hardness test; whereas a
hard steel ball might do well on both (?). Must find somebody who knows
about these things. Any help out there? I'm curious.

-Bob

Bob Sciamanda sciamanda@edinboro.edu
Dept of Physics sciamanda@worldnet.att.net
Edinboro Univ of PA http://www.edinboro.edu/~sciamanda/home.html