a body falls freely from the top of a building and reaches the ground in 5 seconds.find the height of the building
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u = 0
t = 5sec
distance travelled = height of building = h
h = 0.5gt² = 0.5×9.8×5² = 122.5m
t = 5sec
distance travelled = height of building = h
h = 0.5gt² = 0.5×9.8×5² = 122.5m
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