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object is falling freely from a tower it travels distance =1/2 the height of the tower in its last second of journey |
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Answer» Answer: Explanation: Time of flight = g 2H
s Distance traveled in LAST second =H-distance traveled in =( g 2H
−1)s Distance TRAVELD in ( g 2H
−1)s= 1 g( g 2H
−1) 2
= 2 g [ g 2H +1−2 g 2H
] =H+ 2 g −g g 2H
=H+ 2 g −g 2H g 15=H−(H+ 2 g − 2gH
= 2gH − 2 g = 2gH −5 2gH =20 2×10×H=400 H=20m |
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