The physical pendulum
Frequently Asked Questions
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Ans: A simple pendulum is an idealized model consisting of a point mass suspended
by a massless, unstretchable string. When the point mass is pulled to one side of
its straight-down equilibrium position and released, it oscillates about the equilibrium
position. view more..
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Ans: The following discussion of the vibrations of molecules uses the binomial theorem.
If you aren’t familiar with this theorem, you should read about it in the appropriate
section of a math textbook.
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Ans: A mechanical watch keeps time based on the oscillations of a balance wheel
(Fig. 14.19). The wheel has a moment of inertia I about its axis. A coil spring
exerts a restoring torque tz that is proportional to the angular displacement u
from the equilibrium position. We write tz = -ku, where k (the Greek letter
kappa) is a constant called the torsion constant. Using the rotational analog
of Newton’s second law for a rigid body, gtz = Iaz = I d2
u>dt2
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Ans: A physical pendulum is any real pendulum that uses an extended body, as contrasted
to the idealized simple pendulum with all of its mass concentrated at a
point. F view more..
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