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julia jumps straight upward on mars, where the acceleration due to gravity is 3.7\,\dfrac{\text{m}}{\text{s}^2}3.7 s 2 m 3, point, 7, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction downward. after 3\,\text{s}3s3, start text, s, end text, julia is falling downward with a velocity of 3.1\,\dfrac{\text{m}}{\text{s}}3.1 s m 3, point, 1, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. assuming air resistance is negligible, what was the initial vertical velocity of julia's jump? answer using a coordinate system where upward is positive. \dfrac{\text m}{{\text s}} s m
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