5)A person stands at the center of a frictionless turntable. The arms of the persor are stretched and the person holds 5 kg dumbbells in each hand, 1 m away from the axis of rotation. He is initially rotating making one revolution in 2 s. Find the work that needs to be done by the person in order to bring each dumbbell to a distance 0.2 m away from the axis of rotation. (Assume that the moment of inertia of the person remains constant during the process.)

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Chapter1: Units, Trigonometry. And Vectors
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5)A person stands at the center of a frictionless turntable. The arms of the person
are stretched and the person holds 5 kg dumbbells in each hand, 1 m away from
the axis of rotation. He is initially rotating making one revolution in 2 s. Find the
work that needs to be done by the person in order to bring each dumbbell to a
distance 0.2 m away from the axis of rotation. (Assume that the moment of
inertia of the person remains constant during the process.)
Transcribed Image Text:5)A person stands at the center of a frictionless turntable. The arms of the person are stretched and the person holds 5 kg dumbbells in each hand, 1 m away from the axis of rotation. He is initially rotating making one revolution in 2 s. Find the work that needs to be done by the person in order to bring each dumbbell to a distance 0.2 m away from the axis of rotation. (Assume that the moment of inertia of the person remains constant during the process.)
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