A uniform rod (mass m = 1.0 kg and length L = 2.0 m) pivoted at one end oscillates in a vertical plane as shown below. The period of oscillation (in s) is approximately
?
?
A. 4.0.
B. 1.6.
C. 3.2.
D. 2.3.
E. 2.0.
Answer: D
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