### What is the final rotational kinetic energy of the dough

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You are visiting a pizza parlor and watch the chef make a pizza crust. He throws a spinning disk of dough in the air. Its angular velocity is 15 rad/s. During the toss, its radius changes from 7.0 cm to 12.0 cm. The dough%u2019s mass is
3.25 kg, and it can be modeled as a uniform disk.

a) What is the initial angular momentum of the disk of dough?

b) What is the initial rotational KE of the disk of dough?

c) What is the final angular velocity of the disk of dough?

d) What is the final angular momentum of the dough?

e) What is the final rotational kinetic energy of the dough?

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