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Re: [Phys-l] (no subject)

Quoting Bob Sciamanda <treborsci@verizon.net>:

My point was simply semantic: What do you mean by "unstoppable"?

1) It can experience the largest force and not have its velocity changed.
or
2) It experiences no forces.

"Unstoppable" may have another meaning in mirror reflection.

3) It can experience force with its velocity reversed.

Sometimes, the problems of semantics should be explained to the students.
It depends on how we idealize the notions of "unstoppable" and "unmovable".


Alphonsus