Question: On an essentially frictionless, horizontal ice rink, a skater moving at 3.0 m/s encounters a rough patch that reduces her speed by 4S% due to

On an essentially frictionless, horizontal ice rink, a skater moving at 3.0 m/s encounters a rough patch that reduces her speed by 4S% due to a friction force that is 25% of her weight. Use the work-energy theorem to find the length of this rough patch.

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