7, 8, 9, and 10

7. What is the angular momentum of a gyroscope that is a solid cylinder with a radius of .024 m, a mass of 15 kg and an angular velocity of 140 rad/sec. 8. A ballerina spinning at 1.2 rev/sec with a moment of inertia of 2.6 kgm pulls her arms in so that her new moment of inertia is 1.8 kgm. What is her new angular speed? 9. A group of children playing on a merry go round spinning at 52 rpm with a moment of inertia of 200 kgm' move to its center so that the new moment of inertia is 120 kgm?. What is the new angular speed? 10. A figure skater spinning at 3.4 rad/sec with a moment of inertia of 3.2 kgm puts his arms out so that his new moment of inertia is 4.5 kgm. What is his new angular speed