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position OB. The elastic modulus of the f
149 An exerciser begins with his arm in the relaxed ver-
tical position OA, at
stretched. He then
band is un-
his arm to the horizontál/
band
twhich the elastic
is
k =
60 N/m-that is, 60 N of force is required to stretch
the band each
mine the moment about O of the force which the
additional meter of elongation. Deter-
band exerts on the hand B.
Jie
Ans. Mo = 26.8 N m CCW
Jup
635 mm
F
740 mm
C

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