A hollow sphere of mass M and radius R kg · m? about a line through its center of mass, rolls without slipping up a surface inclined at 0 = 30° to the horizontal. At a certain position, say at a height h1 from the ground, the sphere's total kinetic energy (its center of mass kinetic energy plus its rotational kinetic energy) is 20 J. (Hint: The moment of inertia of such a halo sphere is I = MR?. The translational speed of a point on the surface of the sphere is the same as the speed of the center of mass of the sphere) 0.15 m, with rotational inertia I = 0.040 (a) What ratio of this total kinetic energy is rotational? (b) What is the speed of the center of mass of the sphere at this position? 1 m up the incline from this (initial) position, using When the sphere has moved d conservation of energy, find (c) its total kinetic energy and (d) the speed of its center of mass d = 1m

College Physics
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Chapter8: Rotational Equilibrium And Rotational Dynamics
Section: Chapter Questions
Problem 48P: A solid uniform sphere of mass m and radius R rolls without slipping down an incline of height h....
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Problem 4
A hollow sphere of mass M and radius R =
kg · m? about a line through its center of mass, rolls without slipping up a surface inclined
at 0 = 30° to the horizontal. At a certain position, say at a height hi from the ground, the
sphere's total kinetic energy (its center of mass kinetic energy plus its rotational kinetic
energy) is 20 J. (Hint: The moment of inertia of such a halo sphere is I =
translational speed of a point on the surface of the sphere is the same as the speed of the
center of mass of the sphere)
0.15 m, with rotational inertia I
0.040
MR. The
(a) What ratio of this total kinetic energy is rotational?
(b) What is the speed of the center of mass of the sphere at this position?
When the sphere has moved d = 1 m up the incline from this (initial) position, using
conservation of energy, find
(c) its total kinetic energy
and
(d) the speed of its center of mass
d = 1m
R
Transcribed Image Text:Problem 4 A hollow sphere of mass M and radius R = kg · m? about a line through its center of mass, rolls without slipping up a surface inclined at 0 = 30° to the horizontal. At a certain position, say at a height hi from the ground, the sphere's total kinetic energy (its center of mass kinetic energy plus its rotational kinetic energy) is 20 J. (Hint: The moment of inertia of such a halo sphere is I = translational speed of a point on the surface of the sphere is the same as the speed of the center of mass of the sphere) 0.15 m, with rotational inertia I 0.040 MR. The (a) What ratio of this total kinetic energy is rotational? (b) What is the speed of the center of mass of the sphere at this position? When the sphere has moved d = 1 m up the incline from this (initial) position, using conservation of energy, find (c) its total kinetic energy and (d) the speed of its center of mass d = 1m R
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