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29 December, 16:46

What is the speed of a 2.5-kilogram mass after ot has fallen freely from rest through a distance of 12 meters? a) 4.8 m/s b) 15 m/s c) 30. m/s d) 43 m/s

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  1. 29 December, 17:28
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    Vf^2 = Vi^2 + 2ad

    Vf^ = 0 + 2 (-9.8) (-12)

    Vf^2 = 235.2

    Vf = 15.3 m/s

    The correct answer is b) 15 m/s
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