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-----Original Message-----
From: John S. Denker [mailto:jsd@MONMOUTH.COM]
Sent: Wednesday, February 06, 2002 12:09 PM
To: PHYS-L@lists.nau.edu
Subject: Re: car acceleration
Rick Tarara wrote:
...
During the push
there MUST be some deformation of the wall.
Some deformation? Yes.
Significant deformation? No, not for realistic
walls and realistic hands.
That deformation may be very small,
yes.
but then the forces are very large.
No, the force is specified in the statement
of the problem. The amount of deformation is
given by the specified force divided by the
stiffness of the wall, and the divisor is
usually very large.
Energy is stored in the deformed
wall BUT came from the person.
Is there the slightest evidence that this
energy is significant? I haven't seen any.