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A circular platform is mounted on a vertical frictionless axle.Its radius is 2m and its moment of inertia is 200 .. its initially at rest.a 70 kg man stands on the edge of the platform and begins to walk along the edge at speed v =1 m/s relative to the ground .Angular velocity of the platform is??
Dear Sai,
Li=Lf
Lf=LPf+LGf=0
IP=MR22=100x322=450kg−m2
IG=mR2=60x32=540kg−m2
ωGf=−vR=−13rad/s
LPf+LGf=IPωPf+IGωGf=0
ωPf=−−1x5403x450=0.4rad/s
LGf=−mvr⊥=−60x1x3=−180kg−ms2
Best Of luck
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