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Another question:
This business of fictitious forces having no 3rd Law counterpart keeps
cropping up. Of course, in my seat in the accelerating 747 I feel myself
being pressed back into the seat, and the seat pressing back on me,
but I
guess the case in question is the force which is accelerating the escaped
drinks trolley down the aisle to the back of the plane. OK, there seems to
be no 3rd law counterpart for this force.
So back to me seated in front of
my computer - I knock my coffee mug off the table and it falls to the floor.
In class (not the GR class) I would say that the Earth is pulling the
falling mug with force mg, and the mug is pulling the Earth back with
exactly the same force. Does this mean that mg is not fictitious after all?
...
Comments appreciated. Mark.
Mark Sylvester
United World College of the Adriatic
34013 Duino TS
Italy.
msylvest@spin.it
tel: +39 49 3739 255