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A toy top with a spool of diameter 5.1 cm has a moment of inertia of...

A toy top with a spool of diameter 5.1 cm has a moment of inertia of 3.3×10−5 kg⋅m2 about its rotation axis. To get the top spinning, its string is pulled with a tension of 0.31 N .

How long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.

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