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प्रश्न
A body falls from the top of a building and reaches the ground 2.5 s later. How high is the building? (Take g = 9.8 m s-2)
उत्तर
Given time t = 2.5, g = 9.8 m/s2
Height, H = (1/2) gt2
Or, H = (1/2) (9.8) (2.5)2
Or, H = 30.6 m
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