The displacement x changes with time as:
, where A is amplitude, ω is the angular frequency, and t is time.
In our case, we're told that A = 0.320
Therefore, our equation will be:
x = 0.320cosωt
At t = 0. x = 0.320 m
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Our tutors have indicated that to solve this problem you will need to apply the Simple Harmonic Motion of Pendulums concept. You can view video lessons to learn Simple Harmonic Motion of Pendulums. Or if you need more Simple Harmonic Motion of Pendulums practice, you can also practice Simple Harmonic Motion of Pendulums practice problems.