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November 27, 2014

November 27, 2014

Posted by **Brian** on Friday, November 6, 2009 at 4:19pm.

- physics -
**MathMate**, Friday, November 6, 2009 at 8:50pmmr..........|..............mc

mc..............|..........mr

The vertical bar | represents the centre of gravity of the masses of the two persons, mr for Ricardo, and mc for Carmelita.

When they exchange seats, they exert a force on the canoe in such a way that the heavier person pushes more on the canoe. The centre-of gravity (in theory) remains at the same place.

Therefore (3 - 0.635)/2=1.1825 is the location of centre of gravity from Ricardo.

We have therefore:

mr*1.1825=mc*(3-1.8175)

mc=mr*1.1825/1.8175

=57.25 kg

Check my thinking.

- physics -
**Anonymous**, Friday, March 30, 2012 at 5:11pmso

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