Stick Spinning

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Physics help needed?

1)
(a) What is the angular momentum of a figure skater spinning (with arms in close to her body) at 2.0 rev/s, assuming her to be a uniform cylinder with a height of 1.5 m, a radius of 12 cm, and a mass of 55 kg.
kg*m^2/s
(b) How much torque is required to slow her to a stop in 5.0 s, assuming she does not move her arms?
m*N
2)A uniform stick 1.0 m long with a total mass of 300 g is pivoted at its center. A 2.5 g bullet is shot through the stick midway between the pivot and one end . The bullet approaches at 250 m/s and leaves at 160 m/s. With what angular speed is the stick spinning after the collision?
rad/s

You seem to be on track for question 1.

For question 2 try approaching the problem as a conservation of energy issue. The energy of the stick before hand plus the energy of the bullet before hand must be equal to the energy of the stick and bullet afterwards. (ignoring energy lost in heat and sound etc,)

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