Suppose that after a certain time, tLtL$,$ the string has been pulled through a distance LL$.$ What is $2$$2,$ the final rotational speed of the wheel?

Express your answer in terms of LL$,$ FF$,$ II$,$ and $1$$1.$

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$2$$2=$

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Part B

What is PP$,$ the instantaneous power delivered to the wheel via the force FF at time t$=0$t$=0?$

Express your answer in terms of some or all of the variables $$FF$,$ rr$,$ and $1$$1.$