a. h = 0.5g*t^2.
b. Dx = Xo*t = 10m/s * 5s. = 50 m.
A hammer is thrown horizontally from the flat roof of a tall building at a velocity of 10m/s and hits the ground below after 5 seconds.
(a) How high is the roof?
(b) How far from the building does it land.
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