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Centre of Mass (COM)
the point about which the body is evenly distributed (= 0)
Centre of Mass Changes
from instant to instant during a movement
COM - Points
The moment about point A and B are equal about point C
C is the COM
Reaction Board Method
determine location of COM of an individual
Scale Board Method Equation
0=\left(Fscale\cdot dscale\right)+\left(Fperson\cdot dperson\right)+\left(Fboard\cdot dboard\right)
Segmental Method
COM is calculated using segments
Required knowledge of the masses and location of each body’s segment
Calculating COM Location
you can calculate the location without coordinates
COM Location Equation
length of leg segment / COM/segment length ratio
Calculating Segment Mass
Mass of individual / segment weight/total body weight