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(PHYS011)[2010](f)quiz~2287^_10528.pdf
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Name: ________________ ID: _________________
PHYS 011, Quiz 5
Estimated time: 1:30 C 1:55 pm Nov. 17, 2010
1. (5 points) At t = 0, the displacement of x(0) of the block in a linear oscillator is .8.50 cm. Its velocity v(0) then is .0.920 ms.1, and its acceleration a(0) is +47.0 ms.2.
(a) What are the angular frequency ?
(b) What is the phase constant and amplitude xm?







2. (5 points).A thin rod whose length L is 12.4 cm and whose mass m is 135 g is suspended at its midpoint from a long wire. Its period Ta of angular SHM is measured to be 2.53 s. An irregularly shaped object, which we call X, is then hung from the same wire, and its period Tb is found to be 4.76 s. What is the rotational inertia of object X about its suspension axis? (Rotational inertia of the rod about the center
)