Question
(a)Calculate the angular momentum, in kgm 2 /s, of an ice skater spinning at6.00 rev/sgiven his moment of inertia is0.450kgm 2 . Check units for
(a)Calculate the angular momentum, in kgm2/s, of an ice skater spinning at6.00 rev/sgiven his moment of inertia is0.450kgm2. Check units for consistency.kgm2/s
(b)He reduces his rate of spin (his angular velocity) by extending his arms and increasing his moment of inertia. Find the value of his moment of inertia, inkgm2,if his angular velocity drops to2.05rev/s. How does the absence of any external torque affect the angular momentum of a system?kgm2
(c)Suppose instead he keeps his arms in and allows friction with the ice to slow him to3.00 rev/s.What average torque, inNm,was exerted if this takes18.0seconds?(Indicate the direction with the sign of your answer. Assume that the skater's rotation is in the positive direction.) Nm
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