A ceiling fan with $85-$cmcm$-$diameter blades is turning at $64$ rpmrpm $.$ Suppose the fan coasts to a stop $26$ ss after being turned off.

Part A

What is the speed of the tip of a blade $10$ ss after the fan is turned off? $$

Express your answer with the appropriate units.

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Part B

Through how many revolutions does the fan turn while stopping?