A stone is dropped from the roof of a tall building. It takes 3 seconds to reach the
ground. Find the height of the building. (g=9.8 m/s)
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t = 3s
g = 9.8m/s
u = 0m/s (free fall)
h = u×t²+1/2×g×t²
h = 0×3²+1/2×9.8×3²
h = 0×9+4.9×9
h = 0+44.1
h = 44.1m
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