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Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 203 Weeks Ago, 4 Days Ago |
Questions Answered: | 12843 |
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MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
Directions: Assume, unless otherwise specified, that all numbers have at least 3 significant figures. A pendulum is constructed by attaching a non-uniform disk of mass M and radius R to a uniform stick of mass 4M and length 3R (see sketch). The surface density of the disk is given by ï³ = a r2,
where r is the distance from the diskâs center and a is a constant that can be determined and
written in terms of M and R. The other end of the stick is attached to a frictionless pivot. With the pendulum held in a horizontal position, it is released from rest. When the pendulum makes an angle of 30ï° with the vertical, findâ¦
A. The angular acceleration of the pendulum. B.  The tangential speed of the center of mass. C. The force (magnitude and direction) exerted by the pivot on the pendulum.
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