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Normal force is that of two surfaces with the force perpendicular to the
surface.
Friction is a force btn two surfaces due to their contact
Gravitational Force is a a force due to masses attraction for each other
(at the Newtonian level)
Tension caused by a cable etc..
Centripetal force is the only force I can think of that has a name but
means total.
Jack's point that name is 'inconsequential as long as everyone is clear
on your meaning' is true & well-taken. I have gone a similar route to
Dan. I call it the net radial force. I try to beat into them that net
means total and hope that this name works. I suppose it might also work
to put similar effort into defining centripetal. However, it is the 1
exception to the trend of 'named' forces having a singular cause.
I think I first heard Boris K. use net radial to replace centripetal. I
have found it useful with my students.
Paul Lulai . . . To wonder is to begin to understand
Physics Instructor
Saint Anthony Village Senior High School, ISD 282
3303 33rd Avenue N.E.
Saint Anthony Village, MN 55418
(w) 612-706-1144
(fax) 612-706-1140
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