2. A 20-kg sphere 0.05 m in radius starts from rest and rolls (without slipping) 8.0 m down a ramp that is inclined at 30° with the horizontal. (a) What is the angular speed of the sphere at the bottom of the slope if it starts from rest? (b) How much rotational kinetic energy does the sphere have at the bottom of the slope?
2. A 20-kg sphere 0.05 m in radius starts from rest and rolls (without slipping) 8.0 m down a ramp that is inclined at 30° with the horizontal. (a) What is the angular speed of the sphere at the bottom of the slope if it starts from rest? (b) How much rotational kinetic energy does the sphere have at the bottom of the slope?
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter8: Rotational Equilibrium And Dynamics
Section8.5: Rotational Kinetic Energy
Problem 8.4QQ: Two spheres, one hollow and one solid, are rotating with the same angular speed around an axis...
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