Solved: (a) What is the angular momentum of a figure

Chapter 2, Problem 57P

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QUESTION:

Problem 57P

(a) What is the angular momentum of a figure skater spinning at 3.5 rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15 cm, and a mass of 55 kg? (b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms?

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QUESTION:

Problem 57P

(a) What is the angular momentum of a figure skater spinning at 3.5 rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 15 cm, and a mass of 55 kg? (b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms?

ANSWER:

Step 1 of 3

Part (a)

The initial angular momentum equation can be expressed as,

                                                               

 

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