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(c) One interpretation of this question is “what is the most negative value of the
acceleration?” in which case the answer is –
a
m
= –30 m/s
2
. Another interpretation is
“what is the smallest value of the absolutevalue of the acceleration?” in which case the
answer is zero.
(d) Since the period is
T
= 2
π
/
ω
= 0.628 s. Therefore, seven cycles of the motion requires
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 Spring '08
 Any
 Physics, Acceleration

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