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In a message dated 11/6/2003 3:08:09 PM Eastern Standard Time, rlamont@POSTOFFICE.PROVIDENCE.EDU writes:
The v in
this case is the sideways speed of the sand, not the speed of the
flatcar down the track - which remains constant because
there is no
force in this direction.
Bob at PC
How do we know that "in this case" v is the sideways speed of the sand? Sorry to sound so stupid...just trying to completely straighten out my thinking on this.
Justin Parke
Oakland Mills High School
Columbia, MD