17. Periodic Motion
Simple Harmonic Motion of Pendulums
Multiple Choice
Multiple ChoiceA 20 kg child is on a swing that has chains long. Being interested in physics, the child's father gives a push and then watches to see what happens. He notices that the amplitude of the child's oscillation decreases by half in 20 s. What is the value of the time constant?
A
10 s
B
14 s
C
18 s
D
20 s
E
66 s
F
29 s
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