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30 August, 21:14

If a ball with an original velocity of 0 is dropped from a tall structure and takes 7 Seconds to hit the ground what velocity does the ball have when it reaches the ground

A. 156.8

B. 240.1

C. 68.6

D. 34.3

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Answers (1)
  1. 30 August, 21:41
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    Gravity adds 9.8 m/s to the downward speed of a falling object every second. (On Earth.)

    In 7 seconds, gravity adds (7 x 9.8 m/s) = 68.6 m/s to the downward speed of a falling object.

    (IF air resistance has no effect on the object.)
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