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Make the following assumptions:
-- Ignore air resistance ===> all objects fall at the same rate, i.e. same distance in the same time.
-- It drops from a stand-still ... nobody throws it down.
x = 1/2 G t2
t = sqrt( 2x / G ) = sqrt(140/32.2) = sqrt(4.348) = 2.085 seconds (rounded)
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∙ 14y ago
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