Find where does the extra kinectic energy come from

Reference no: EM13557821

An ice skater spinning with outstreched arms has an angular sped of 4.0 rad/s. She tucks her arms in, decreasing her moment of inertia by 7.5%.

(A) what is the resulting angular speed?

(B) By what factor does the skater's kinectic energy change? (neglect any frictional effects)

Reference no: EM13557821

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