physics

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You throw a ball downward from a window at a speed of 2.7 m/s. How fast will it be moving when it hits the sidewalk 2.8 m below?

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    How far does a plane fly in 13 s while its velocity is changing from 142 m/s to 75 m/s at a uniform rate of acceleration?

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    You throw a ball upward from a window at a speed of 1.7 m/s. How fast will it be moving when it hits the sidewalk 2.5 m below?

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