A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2/3 . Suppose a 2.50 m rod with a mass of 3.00 kg is hinged at one end and is held in a horizontal position. The rod is released as the free end is allowed to fall. What is the angular acceleration as it is released?
a. 3.70 rad/s2
c. 5.88 rad/s2
b. 7.35 rad/s2
d. 4.90 rad/s2
C
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Angular Momentum: A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg ? m2. If he pulls in his arms so his moment of inertia decreases to 1.80 kg ? m2, what will be his new angular speed?
A. 2.25 rad/s B. 4.60 rad/s C. 6.25 rad/s D. 0.81 rad/s
A series of possible particle processes are listed below. Which (if any) are probably not processes mediated by the weak interaction? (Note: ? = a photon, ? = a muon, which is a lepton like the electron but heavier. Don’t worry about conservation of energy.)
A. 
B. 
C. 
D. 
E. All might be weak processes.
When Copernicus first created his Sun-centered model of the universe, it did not lead to substantially better predictions of planetary positions than the Ptolemaic model. Why not?
What will be an ideal response?
The energy attributed to an object by virtue of its motion is known as ________
A) radiative energy B) kinetic energy C) potential energy D) mass-energy