PHY 121 Ch 9b Lecture

# PHY 121 Ch 9b Lecture - Lecture 17 Tuesday March 25 1 The...

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1 Lecture 17 Tuesday, March 25

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2 The kinetic energy of a rotating body A. is proportional to the moment of inertia. B. is proportional to the square of the moment of inertia. C. is inversely proportional to the moment of inertia. D. is independent of the moment of inertia.
3 The gravitational potential energy of an extended object of total mass M A. is directly proportional to the moment of inertia. B. Is the same as the potential energy of a point mass M at the position of the center of mass. C. is proportional to the square of the angular velocity. D. is not discussed in the reading assignment.

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4 A solid cylinder and a solid sphere have the same mass M and the same radius R A. both have the same moment of inertia. B. The cylinder has a higher moment of inertia. C. The sphere has a higher moment of inertia. D. Not enough information to decide which object has a larger moment of inertia.
5 A pool cue is a wooden rod with a uniform composition and tapered with a larger diameter at one end than at the other end. Its moment of inertia: A. is largest for an axis parallel to the length of the rod and through the center of mass. B. is largest for an axis perpendicular to the length of the rod and through the center of mass. C. is largest for an axis perpendicular to the length of the rod and through its thicker end. D. is largest for an axis perpendicular to the length of the rod and through its thinner end.

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6 Kinetic energy of an extended object The kinetic energy of any many-particle system is defined as K = 1 2 i = 1 N ! m
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PHY 121 Ch 9b Lecture - Lecture 17 Tuesday March 25 1 The...

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