QUESTION

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The acceleration due to gravity near the surface of Mars is $3.69 \mathrm{~m} / \mathrm{s}^{2}$. One morining, an astronaut tests her jetpack. Starting from rest, the jetpack accelerates her upward from the ground with a constant acceleration of $10 \mathrm{~m} / \mathrm{s}^{2}$, but after $4 \mathrm{~s}$, the jetpack shuts off. What is her speed right before she hits the ground? Please give your answer in $\mathrm{m} / \mathrm{s}$.

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