A diver comes off a board with arms straight up and legs


A diver comes off a board with arms straight up and legs straight down, giving her a moment of inertia about her rotation axis of 18kg⋅m2. She then tucks into a small ball, decreasing this moment of inertia to 3.6kg⋅m2. While tucked, she makes two complete revolutions in 1.3s.

If she hadn't tucked at all, how many revolutions would she have made in the 1.6 s from board to water?

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