TV broadcast antennas are the tallest artificial structures on Earth.  In 1987, a 72.0 kg physicist placed himself and 400 kg of equipment at the top of one 610 m high antenna to perform gravity experiments.  By how much was the antenna compressed, if we consider it to be equivalent to a steel cylinder 0.150 m in radius. Group of answer choices 190 km 190 cm 190 mm 190  μ m

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!