When a spinning figure skater pulls her arms close to her body (Fig. 9.11), she spins faster. If she then pushes her arms away from her body, her angular velocity decreases. Her rotational kinetic energy also decreases. Explain why her kinetic energy decreases. What force or torque does the corresponding work?

Figure 9.11

Transcribed Image Text:

wf L; = I;w; = !f@f= Lf Larger than w; Smaller than I;