7. A men's basketball has a radius of about 12 cm and a mass of about 0.63 kg. It can be treated as a thin spherical shell with a rotational inertia of mr2 about an axis that goes through its center. (a) On YouTube, I found a video of Scooter Christiansen of the Harlem Globetrotters spinning a basketball balanced on their forehead. It looked like the basketball was initially spinning at a rate of 4.0 rev/s. What is the angular momentum of the bas- ketball? (Don't forget to give the direction! Refer to the image to the right, which has an added arrow showing the direction of the spin of the ball.) PREHE # ALE 15.11 INSHEats 3000 HARLEM OBETROTTERS to by (b) Over a five second span in the video, the basketball slowed down to a stop, still balance on their forehead. What is the average angular acceleration of the basketball durir those 5 seconds? (Remember that angular acceleration should be in rad/s/s and is vector.) (c) What is the average torque experienced by the basketball due to the friction from int acting with the forehead?

7. A men's basketball has a radius of about 12 cm and a mass of about 0.63 kg. It can be treated as a thin spherical shell with a rotational inertia of mr2 about an axis that goes through its center. (a) On YouTube, I found a video of Scooter Christiansen of the Harlem Globetrotters spinning a basketball balanced on their forehead. It looked like the basketball was initially spinning at a rate of 4.0 rev/s. What is the angular momentum of the bas- ketball? (Don't forget to give the direction! Refer to the image to the right, which has an added arrow showing the direction of the spin of the ball.) PREHE # ALE 15.11 INSHEats 3000 HARLEM OBETROTTERS to by (b) Over a five second span in the video, the basketball slowed down to a stop, still balance on their forehead. What is the average angular acceleration of the basketball durir those 5 seconds? (Remember that angular acceleration should be in rad/s/s and is vector.) (c) What is the average torque experienced by the basketball due to the friction from int acting with the forehead?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter8: Rotational Motion

Section: Chapter Questions

Problem 74A

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