The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about…
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Question “The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about…”
The outstretched hands and arms of a figure skater preparing for
a spin can be considered a slender rod pivoting about an axis
through its center . When his hands and arms are brought in and
wrapped around his body to execute the spin, the hands and arms can
be considered a thin-walled hollow cylinder. His hands and arms
have a combined mass 9.0 kg. When outstretched, they span 1.7 m;
when wrapped, they form a cylinder of radius 26 cm. The moment of
inertia about the rotation axis of the remainder of his body is
constant and equal to 0.40 kg * m2.
If his original angular speed is 0.30 rev/s, what is his final
angular speed?
Answer
Conclusion
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