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1 August, 04:37

A water balloon was dropped from a high window and struck its target 1.1 seconds later. If the balloon left the persons hand at - 5.0 m/s, what was the velocity on impact?

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  1. 1 August, 06:01
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    The acceleration of gravity on Earth is 9.8 meters per second every second. So

    in 1.1 second of falling, an object gains (9.8 x 1.1) = 10.78 meters per second of

    downward speed.

    The balloon was already falling at 5 m/sec when the time began, and it gained

    another 10.78 m/sec on the way. So at the end of 1.1 second, its downward

    speed was (5.0 + 10.78) = 15.78 m/sec.

    Its velocity was 15.78 m/sec downward.
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