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a small brick mass 700 g is projected vertically downwards at a velocity of 1,25(m/s) from the top of a building of height 25m.calculate the magnitude of the velocity at which the brick hits the ground?

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we need
25-1.25t-4.9t^2 = 0
t=2.135

so, we have a final v of

v = -1.25 - 9.8(2.135) = ?

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