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39. No external forces with horizontal components act on the manstone system and the
vertical forces sum to zero, so the total momentum of the system is conserved. Since the
man and the stone are initially at rest, the total momentum is zero both before and after
the stone is kicked. Let
m
s
be the mass of the stone and
v
s
be its velocity after it is kicked;
let
m
m
be the mass of the man and
v
m
be his velocity after he kicks the stone. Then
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Force, Momentum

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