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A Projectile Is Dropped, and Reaches the Ground at 140

question 362

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A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is , where a = -10 .) A) 7 s B) 28 s C) 4.47 s D) 14 s E) 3.16 s , where a = -10 A projectile is dropped, and reaches the ground at 140 m/s. How long does it take the projectile to reach ground? (Assume the position function is , where a = -10 .) A) 7 s B) 28 s C) 4.47 s D) 14 s E) 3.16 s .)

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